Metaglossary.com - Definitions for "{term}"

Keywords: amu, isotope, nuclide, protons, mass

Atomic mass is the correct name for the more commonly used term atomic weight The atomic mass of an element is the weighted aveverages of the masses (measured in atomic mass units) of all natural isotopes of the element. For example magnesium has 3 naturally occuring isotopes: Mg-24, 78.99 % Mg-25, 10.00 % Mg-26, 11.01 % Since Mg has an atomic number of 12, we know its nucleus has 12 protons. Thus, the atomic mass (atomic weight) of naturally occuring Mg is : M Mg = 0.7899 x (12 x 1.00728 amu + 12 x 1.00867 amu + 12 x 0.00055) + 0.1000 x (12 x 1.00728 amu + 13 x 1.00867 amu + 12 x 0.00055) + 0.1101 x (12 x 1.00728 amu + 14 x 1.00867 amu + 12 x 0.00055) - 0.215976 amu ( mass defect) = 24.30500 amu where 1.00728 amu = mass of a proton, 1.00867 amu = mass of a neutron, 0.00055 amu = mass of an electron and 0.215976 amu is mass equivalent of the energy released in the formation of the Mg nucleus from protons and neutrons (see Chemistry Review )

prism.gatech.edu

1. The sum of protons and neutrons in an atom's nucleus. 2. The combined mass of all the particles in a given atom.

inlandlapidary.com

the mass of a nucleus in atomic mass units (amu), based on a standard of 12.00000 for . Syn. atomic weight.

sahra.arizona.edu

(also called atomic weight) • The average mass of an atom of an element on the amu scale. (The average depends upon the relative amounts of different isotopes of an element on Earth.)

whfreeman.com

The atomic mass is found on the periodic table below the symbol of the element in each box and represents the average mass of an atom. For elements with only one isotope, this mass is the same as the mass of each atom. However, for elements with more than one isotope, not all atoms will have the same mass. Then, the atomic mass is the average mass for all the isotopes of the element.

chem.wisc.edu

the total number of nucleons in a nucleus.

cliffsnotes.com

Atomic mass M and its one standard deviation error.

ie.lbl.gov

(chemistry) the mass (in atomic mass units) of an isotope of an element

wordnet.princeton.edu

the weighted average mass of the atoms in a naturally occurring element.

classzone.com

the mass of one atom of a particular element, expressed in atomic mass units

library.thinkquest.org

The mass of a neutral atom of a nuclide. The atomic weight of an atom is the weight of the atom based on a scale where 12C = 12. The atomic weight of an element is the weighted average of each isotope.

ie.lbl.gov

The mass of an atom usually expressed as atomic mass unit (amu).

accessexcellence.org

Atomic mass refers to the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

treatment-skincare.com

The mass of one atom of an element

the-gold-source.com

number the number of protons and neutrons in the nucleus of a nuclide. (The atomic mass number is not the same as the chemical atomic weight, which is the average of all the naturally occurring isotopes of an element weighted according to their relative abundances.)[] [ Click "BackButton" for previous location

epa.gov

the sum of the protons and neutrons in the nucleus.

matse1.mse.uiuc.edu

The average mass of an atom of an element, usually expressed in atomic mass units. The term is often used interchangeably with atomic weight.

visionlearning.com

Is the sum of the number of protons and neutrons in an atom.

jcc.kctcs.edu

The mass of a neutral atom of a nuclide, usually expressed in terms of "atomic mass units." The "atomic mass unit" is one-twelfth the mass of one neutral atom of carbon-12; equivalent to 1.6604 X 10-24 gm. (Symbol: u).

gulflink.osd.mil

The mass of an isotope of an element expressed in atomic mass units, which are defined as one-twelfth of the mass of an atom of carbon-12.

srp-uk.org

The atomic mass of a chemical element is the mass of an atom at rest, most often expressed in unified atomic mass units. The atomic mass is often synonymous with relative atomic mass, average atomic mass and atomic weight; however, it is subtly different in that it can either be the abundance-weighted average of isotope masses of an element or the mass of a single isotope.

en.wikipedia.org

View 18 more results

Keywords: neogloboquadrina, pachyderma

Neogloboquadrina pachyderma

uoguelph.ca

Keywords: hypokalemia, rash

Hypokalemia Rash

ilpi.com