The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule.
Anything extremely small; a particle; a whit.
An atom is the smallest unit of an element . The atom consists of a nucleus and electrons which orbit the nucleus
The smallest particle that retains all the chemical properties of a given element.
Tiny particles that make up everything around us. Atoms bond together to form molecules.
The tiny building block that makes up everything. BACTERIA Living things that have only one cell and are so small they can only be seen with a microscope.
The smallest unit into which matter can be divided without the release of electrically charged particles, and also the smallest unit of matter that cannot be decomposed into simpler substances by ordinary chemical processes. Hence the atom is the basic building block of chemistry. Atoms, also called chemical elements, can combine with one another to form compounds.
an extremely small particle of matter that retains its identity during chemical reactions.
everything around you is made up of atoms. Atoms join together to make elements, and the elements join together to make compounds, and so on ... until everything is joined together to make - YOU! (Back to "Warning, the rays of the sun can be dangerous!")
the smallest portion of a chemical element that can exist and still retain its characteristic chemical properties. See also: element, Briefing Room
The atom is the basic component of all matter. It is the smallest part of an element and has all the chemical properties of that element. Atoms are made up of protons and neutrons (in the nucleus) and electrons.
the building block of molecules and all things. Atoms are made of a nucleus of protons and neutrons surrounded by orbiting electrons.
The smallest particle that an element can be broken down into and still maintain its unique identity.
the smallest division of matter that retains identity
"The smallest unit of an element composed of a nucleus (the center region that contains protons and nuetrons) and electrons which orbit the nucleus.
The word 'atom' comes from the Greek 'atomos' which means indivisible. Atoms are the smallest particles of an element which can still be recognised chemically as that element. (See Elements, Atoms and Isotopes)
a particle of matter consisting of a positively charged nucleus surrounded by a system of electrons, that cannot be reduced by chemical reaction
Gr. atomos: indivisible] • The smallest unit of a chemical element. Consists of a nucleus and one or more electrons.
The smallest unit of matter as recognized by chemical properties of molecules. Atoms are composed of protons, neutrons and electrons. The latter provide all properties described by molecular interactions and chemical reactions that are essential processes in biology.
the smallest quantity of an element that still possesses the characteristics of the element.
The smallest unit of an element. It is made up of electrons, protons, and neutrons. Protons and neutrons make up the atom's nucleus. Electrons orbit the nucleus.
An atom is the smallest unit of a substance that still has all the properties of that substance. In most cases, an atom consists of protons, neutrons, and electrons. The protons and neutrons are found in the center of the atom, called the atomic nucleus, and the electrons orbit or circle around the center of the nucleus in paths called orbitals.
fundamental building block of matter, consisting of a nucleus (comprising protons and neutrons and an orbiting swarm of electrons.
The smallest particle of a chemical element (about three ten-billionths of a meter in diameter). Atoms are the building blocks of molecules and solid objects; they consist of a cloud of electrons surrounding a dense nucleus a hundred thousand times smaller than the atom itself. Nanomachines will work with atoms, not nuclei.
All matter is comprised of tiny particles called atoms. An atom is the smallest piece of an element that still retains all the properties of the element. Atoms themselves are made up of smaller particles called protons, electrons, and neutrons. The protons and neutrons reside in the nucleus of the atom and make up most of the mass of an atom. The electrons which surround the nucleus contribute only a small amount to the mass of the atom, but comprise most of the volume.
Minute unit made of subatomic particles that is the basic building block of all chemical elements and thus all matter; the smallest unit of an element that can exist and still have the unique characteristics of that element. Compare ion, molecule.
An atom is the smallest unit of any substance that retains the characteristics of a given element. Atoms consist of three major building blocks: positively charged protons, negatively charged electrons, and neutral neutrons.
a very, very small particle that makes up all matter
The smallest possible unit of a chemical element. When an atom is subdivided the parts no longer have properties of any chemical element. An atom consists of a nucleus with orbiting electrons.
The smallest unit of a chemical element. It is several Ångstrom in diameter.
An atom is a particle which forms a building block of nature. Atoms are made up of protons and neutrons in the nucleus, and surrounding electrons. Each element has its own unique atom, and the atomic properties determine the chemical behaviour of the element.
The smallest part of a chemical element that has all the characteristics of that element. Made up of protons, neutrons, and electrons.
The smallest part of a chemical element that has all the chemical properties of that element.
the smallest bit of an element that has all the same properties of that element; the building blocks of all matter.
The smallest possible unit of an element comprised of a nucleus containing one or more protons and (except for hydrogen) two or more neutrons with one or more electrons that revolve or orbit around it.
the smallest unit of an element that still retains all the characteristics of that element.
The fundamental unit of all matter, consisting of a nucleus of protons and neutrons surrounded by orbiting electrons (or in the case of hydrogen just one electron).
the smallest part of an element that can enter into various combinations with atoms of other elements.
The basic building block of matter. Each atom consists of a nucleus with positive electric charge and a surrounding cloud of electrons with negative charge.
an atom is the smallest part of any matter that makes everything and is called "the building blocks of life"
The smallest unit of a chemical element possessing the properties of the element (see also subatomic particles).
The tiniest particle of an element that has the same chemical properties of the element. The building blocks of all matter.
The smallest unit of an element that retains the element's physical and chemical properties.
smallest part of an element that still has the properties of the element; can exist either alone or in combination with other atoms
The smallest part into which an element can be divided and still retain the behavior of the element. Atoms consist of a positively charged nucleus and negatively charged electrons that constantly orbit the nucleus.
A nucleus surrounded by electrons make up an atom. Atoms form the basic units of chemical elements.
The building block of matter. The smallest component of matter that retains its chemical properties. An atom consists of a nucleus and at least one electron. The nucleus of an atom consists of one or more protons and may contain neutrons as well; any electrons surround the nucleus.
A very small object with a diameter of approximately 0.1 nanometers that is the building block for everything in the Universe.
The basic unit of one of the chemical elements.
the smallest piece of a substance that can exist alone or can combine with other substances to form a chemical chain..... return
The smallest unit of en element which still retains the chemical characteristics of that element. An atom is made up of protons and neutrons in a nucleud surrounded by electrons. A molecule of water (H20) consists of two atoms of hydrogen and one atom of oxygen.
The smallest unit of an element which keeps the element's characteristics. An atom can consist of a proton and neutron in a nucleus being orbited by an electron.
The smallest unit of a chemical element; composed of protons, neutrons and electrons. Hydrogen, H, has one proton and one electron. Deuterium, H, has one proton and one neutron and one electron. Deuterium Oxide, D O, is called heavy water. Among the moderators that have been used in nuclear reactors are carbon in the form of graphite, the light metal beryllium, heavy water (having a deuterium nucleus), and ordinary water.
(physics and chemistry) the smallest component of an element having the chemical properties of the element
(nontechnical usage) a tiny piece of anything
a cloud of electrons orbiting around a nucleus composed of protons and neutrons
a collection of matter consisting of a positively charged core (the nucleus
a collection of things from the point of view of an electron, and perhaps the series continues
a complete replica of the solar system, with electrons encircling a nucleus just as planets revolve around the sun
a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus
a general term for this basic building block of matter
a hierarchy of different states of information that define the statistical likelihood of finding a particle here or there at the time of observation
a microscopic structure found in all ordinary matter around
a nanometer-scale object, of course, so everything around us, in its smallest constituent parts, has nanoscale components, threatening to swamp the term and turn a promising realm of inquiry into a grab bag of science and pseudoscience
an electrically neutral body consisting of a nucleus (consisting of protons and neutrons) and a cloud of electrons equal in number to the number of protons in the nucleus
an electrically neutral , spherical entit y composed of positively charged 'central nucleus' surrounded by one or more negatively charged electrons
an emergent property produced by the marriage of protons, neutrons, and electrons
an example of an energy system or metric consisting of electrons, neutrons, protons
an object in Lisp that is not a list and is generally indivisible
a non-zero element of a lattice such that anything less than it is zero, i
a non-zero member of a Boolean algebra that is not a join of any other elements
a particle of matter that uniquely defines a chemical element
a particle of matter which is too small to divide (" a " is the prefix of negation, tomein is the verb, to cut or divide
a person who "matters", i
a single part that makes up an element
a small particle (piece) of matter
a small portion of matter physically indivisible
a submicroscopic structure found in all ordinary matter, the smallest unit of an element to retain all the properties of that element
a tiny nucleus surrounded by clouds of negatively charged electrons
a vast region of empty space in which incredible tiny particles called electrons orbit around a nucleus
a very, very small unit that contains electrically charged protons, electrons, and uncharged neutrons
one of the minute indivisible particles of which according to ancient materialism the universe is composed.
The smallest part of a chemical element, such as hydrogen, helium, or carbon. Atoms possess a compact nucleus surrounded by one or more electrons.
All matter is made up of atoms. Atoms are made up of protons, neutrons, and electrons. The number of protons an atom has, determines that atoms chemical properties. Ozone is made up of three oxygen atoms.
A fundamental unit of matter. It consists of a nucleus and electrons.
The smallest particle of matter that can be obtained just by means of chemical reactions, consisting of a tiny nucleus, which is positively charged and orbitted by negatively charged electrons.
The smallest amount of a chemical element that can exist maintaining the characteristic properties of it. The element atom is constituted by nucleus (protons and neutrons), surrounded by moving electrons.
The smallest object that retains properties of an element. Composed of electrons and a nucleus (containing protons and neutrons).
The smallest particle that makes up all matter and yet retains the chemical properties of the element.
The smallest part of an element that still has all the characteristics of that element.
One of the tiny particles of which all things are made
The fundamental building blocks of chemical elements.
the fundamental unit of which elements are composed.
The smallest unit into which a chemical element may be divided and yet retain its characteristic properties. Atoms bond together to form molecules.
The smallest particle of matter that can exist.
The smallest unit of an element that still possesses the properties of that element.
At atom is the basic component of matter; all matter is divided into one hundred different chemical element having all the chemical properties of the element.
A particle of matter indivisible by chemical means. It is the fundamental building block of elements.
AT-um A chemical unit, composed of protons, neutrons, and electrons, that cannot further break down by chemical means. 32
The most fundamental element in Prolog made up of a string of characters, numbers, and some special characters.
Greek origin (atomos = indivisible), the atoms are the fundamental building blocks of substances. Contrary to their names, atoms have structure. The heavy nucleus is surrounded by lighter electrons moving around in shells.
Smallest particle of an element which can enter into a chemical combination. Molecules are composed of atoms.
The smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons, neutrons, and electrons.
An atom consists of a central nucleus which is surrounded with negatively charged electrons travelling in distinct orbits. The number of protons in the nucleus is matched by the same number of orbital electrons so that the entire atom has no net electrical charge.
The smallest part of an element that has all the properties of the element.
smallest particle of an element that is capable of entering into a chemical reaction.
The smallest unit of an element which has all the properties of the element. It is composed of protons, neutrons and electrons.
the smallest particle of a chemical element that still exhibits the characteristics of that element. An atom constitutes protons and neutrons in its nucleus and levels of orbiting electrons.
Building block of matter, composed of positively charged protons and neutral neutrons in the nucleus, surrounded by negatively charged electrons.
This is the smallest unit of an element. It contains a nucleus with neutrons and protons, surrounded by orbiting electrons.
the smallest division of matter that still displays the chemical properties of an element.
everything around you is made up of atoms. Atoms are so tiny that it takes a very powerful microscope to see them. The atoms join together to make elements, and the elements join together to make compounds, and so on ... until everything is joined together to make - YOU! (Back to Ozone Action! Days)
The smallest unit of an element, consisting of a dense central, positively charged nucleus surrounded by a system of electrons. The structure is usually electrically neutral and is indivisible by chemical reactions.
The smallest indivisible particle of matter that can have an independent existence.
Smallest unit of a chemical element. The lightest atom is the hydrogen atom.
a) The smallest unit of an element, made up of a dense, central, positively charged nucleus surrounded by a system of electrons and typically remaining undivided in chemical reactions.
the smallest division of an element that can exist independently. Atoms are made up of protons, neutrons and electrons, and are the component parts of molecules.
a particle, made up of a nucleus and one or more orbiting electrons, which is the basic unit of a chemical element.
The smallest part of an element which can take part in a chemical reaction. An atom is composed of a positively charged nucleus containing protons and neutrons surrounded by negatively charged electrons. There are about 103 types of atoms.
An atom, roughly 10-8 cm in diameter, consists of a tiny, dense, positively charged nucleus made of neutrons and protons, surrounded by a cloud of negatively charged electrons. Each chemical element consists of atoms that possess a characteristic number of protons. Atoms are held together in molecules by sharing electrons.
Atoms are made of more than one element joined by chemical bonds. Atoms have a nucleus, neutrons, protons, and electrons. Atoms want to remain stable and do so by sharing electrons with other atoms.
A basic unit of matter. Every atom has a positively charged center called a nucleus that is surround by a number of negatively charged electrons.
The basic unit of matter.
The tiny particles of which matter is composed. They consist of a central nucleus made up of positively charged protons and chargeless neutrons, surrounded by a cloud of negatively charged electrons.
Atomic mass Atomic nucleus
The atom is the basic component of all matter everything is made up of atoms. It is the smallest part of an element and has all the chemical properties of that element. The outside of an atom is composed of tiny electrically charged particles called electrons that move with great speed around the center of the atom, called the nucleus.
The smallest component of an element that still has properties of the element, consisting of a positively charged nucleus, and surrounded by a charged cloud of electrons. The nucleus contains protons and may contain neutrons. (See Periodic Table, below) Examples of atoms.
the smallest particles of an element that can exist either alone or in combination, considered a source of vast potential energy.
The whole universe can be explained through the movement of atoms and electrons.
is the smallest unit of a chemical element that can take part in a chemical reaction. An atom is composed of a nucleus containing protons and neutrons, and is surrounded by electrons.
the smallest unit of a chemical element, made up of a nucleus surrounded by electrons
There are many ways of looking at the atom. The most useful one for electron microscopists is to think of it as consisting of a positively charged nucleus (containing positively charged protons and uncharged neutrons) surrounded by negatively charged electrons in discrete orbits.
The smallest physical unit of a chemical element that can still retain all the physical and chemical properties of that element. Atoms combine to form molecules, and they themselves contain several kinds of smaller particles. An atom has a dense central core (the nucleus) consisting of positively charged particles (protons) and uncharged particles (neutrons). Negatively charged particles (electrons) are scattered in a relatively large space around this nucleus and move about it in orbital patterns at extremely high speeds. An atom contains the same number of protons as electrons and thus is electrically neutral (uncharged) and stable under most conditions.
The smallest division of an element still retaining all of the original properties of the element
Smallest unit of a chemical element that retains its characteristic properties.
a very tiny particle that is the basic building block of matter.
The chemical unit of matter.
An atom is the smallest part of an element, which can exist.
The smallest particle of any element that still retains the characteristics of that element. All matter such as solids, liquids, and gases, is composed of atoms.
The smallest distinguishable unit of a material that maintains the same characteristics of that material.
The smallest unit of matter which has specific chemical properties. Breaking an atom into smaller pieces yields subatomic particles which are in no way like any chemical material. Atoms consist of a nucleus, containing protons and, save for ordinary hydrogen atoms, neutrons, and an electron cloud, surrounding the nucleus, containing one or more electrons. In ordinary atoms, the number of electrons in the electron cloud is identical to the number of protons in the nucleus. The interaction of electron clouds in one atom with electron clouds in other atoms determine the chemical properties of the atoms, so atoms with the same number of protons, and therefore, usually the same number of electrons, are considered to be chemically identical.
The smallest unit of any pure substance. All matter is made up of different kinds of atoms. An atom itself is made up of smaller parcticles, such as protons, neutrons, and electrons.
In the philosophy of atomism (q.v.), the eternal, invariant, impenetrably hard, homogeneous, ultimate unit of matter. In chemistry, the smallest unit or part of an element that can take part in a chemical reaction. In modern physics, a complex structure of activity, with a central nucleus orbited by electrons. Nuclei and their constituent particles are in turn complex structures of activity.
The smallest unit of a chemical element, about a third of a nanometer in diameter in diameter. Atoms make up molecules and solid objects. http://www.nano.org.uk/vocab_terms.htm
The smallest unit of matter that still maintains the properties of an element. Atoms are composed of protons, neutrons, and electrons.
a very small part of all things; the smallest part of an element that can join with parts of other elements
The smallest quantity of an element that can take part in a chemical reaction. Atoms are made up of a nucleus containing protons and neutrons, which is surrounded by clouds of electrons.
A unit of matter, the smallest unit of an element, having all the characteristics of that element and consisting of a dense, central, positively charged nucleus surrounded by a system of electrons.
The smallest unit of an element consisting of a dense positively charged nucleus (of protons and neutrons) orbited by negatively charged electrons.
The smallest possible unit of an element. Atoms of the same or different elements combine to form molecules. Atoms remain essentially unchanged during chemical reactions.
Everything is made up of tiny atoms. An atom is the smallest part of an element that has the properties of that element.
The smallest piece of an element that cannot be divided or broken up by chemical means.
The smallest amount of any substance possible. An atom has protons and neutrons at its center and an outer shell of electrons.
The smallest unit of an element that retains the chemical properties of the element. Atoms can exist alone or in combinations with other atoms forming molecules.
1. The smallest unit of an element, consisting of a dense, central core (the nucleus) made of protons and neutrons that is surrounded by orbiting electrons. 2. The smallest unit of matter that can enter into a chemical reaction.
The smallest quantity that can exist and still retain the chemical properties of the element.
Atoms are the smallest part of any material that cannot be broken up by chemical means. Each atom has a center (the nucleus) which contains protons and neutrons. Electrons orbit around the nucleus. In an uncharged atom the number of electrons orbiting the nucleus equals the number of protons in the nucleus. The atom is primarily empty space. If the nucleus of an atom was the size of the button on a baseball pitcher's cap, the electrons would be like dust particles revolving around the outside of the baseball stadium at nearly the speed of light. back to
he smallest unit of a chemical element made up of a nucleus containing protons and neutrons, and electrons which orbit the nucleus. alcine To reduce a substance to a powder by means of heat.
Primary basis of all matter. It has a nucleus consisting of protons and neutrons surrounded by orbiting electrons .
The smallest part of an element that still has all properties of that element. Its nucleus consists of protons and neutrons and is surrounded by orbiting electrons.
The smallest unit of matter. Scientists so far have found 112 different kinds of atoms. Everything in the world is made of different combinations of these atoms.
The smallest particle of an element.
An atom is the smallest part of an element that retains the properties of the element. The centre of an atom is called the nucleus, and this contains particles called protons (positively charged) and neutrons (neutral). Around the nucleus there are negatively charged particles called electrons. Since the overall charge on an atom is zero, the number of protons is equal to the number of electrons. Atoms of different elements contain different numbers of these particles. Here we see a basic drawing of a helium atom ( 42 He). The nucleus contains two protons and two neutrons, with two electrons outside: IF YOU CAME HERE FROM A DIFFERENT PAGE, CLICK ON THE BACK BUTTON TO GO BACK TO THE PAGE YOU WERE VIEWING.
The building blocks of matter. Once thought to be indivisible particles*, atoms are now understood to consist of electrons*, protons* and neutrons*. Click here to go back to where you were.
The smallest part of an element of matter that retains the basic characteristics of the element. An atom consists of a tightly packed nucleus composed of protons and neutrons surrounded by a "cloud" of electrons that arrange themselves in an orderly pattern according to the rules of quantum mechanics. Atoms with equal numbers of protons and electrons are electrically neutral; ions are simply atoms that contain more or fewer electrons than protons. Atoms are very small -- much smaller than the wavelength of visible light. The simplest and most abundant atom in the universe is hydrogen, which contains one proton and one electron.
The smallest stable unit of matter.
The basic building block of all matter. All atoms consist of a nucleus containing protons and neutrons surrounded by different numbers of electrons. The different number of protons in the nucleus is what make the atoms appear as different elements (for example, Helium, Oxygen, Carbon).
The smallest unit of a chemical element, about a third of a nanometer in diameter. Atoms are the basis for molecules & solid objects.
The smallest piece of an element (p.31-40).
A particle of matter which cannot be broken up by chemical means. Atoms have a nucleus consisting of positively-charged protons and uncharged neutrons of the same mass. The positive charges on the protons are balanced by a number of negatively-charged electrons in motion around the nucleus.
The smallest unit of matter that possesses chemical properties. All atoms have the same basic structure: a nucleus containing positively charged protons with an equal number of negatively charged electrons orbiting around it. In addition to protons, most nuclei contain neutral neutrons whose mass is similar to that of protons. Each atom corresponds to a unique chemical element determined by the number of protons in its nucleus.
The smallest portion of an element that can combine chemically with other atoms.
A submicroscopic building block of much of matter, consisting of a positively charged nucleus and one or more negatively charged electrons in orbit around the nucleus.
The smallest possible component of an element. An atom is comprised of a nucleus (made up of one or more protons and two or more neutrons except for hydrogen which may have no neutrons) and one or more electrons which revolve around the nucleus.
Any of the indivisible particles claimed to be the basic component of all matters.
All elements are made of atoms. An atom consists of a nucleus containing protons and neutrons, surrounded by electrons. Classifying materials
The smallest unit of a chemical element which retains its own characteristics. An excellent book on the atoms and Einstein's theory of relativity is "Mr Tompkins in paperback" by George Gamow
The building blocks of all matter, atoms are made up of a nucleus consisting of protons and neutrons, and a number of electrons that orbit the nucleus. An electrically neutral atom has as many protons as it has electrons.
The smallest particle on anelement possessing the unique characteristics of that element.
In chemistry and physics, an atom (Greek ἄτομος or átomos meaning "indivisible") is the smallest particle of a chemical element that retains its chemical properties. (átomos is usually translated as "indivisible" or "uncuttable." Until the advent of quantum mechanics, dividing a material object was invariably equated with cutting it.)
Atom is a home computer game published by Tandy in 1983 for the TRS-80. The game educated the player about the periodic table of elements.
