A subatomic particle with zero charge and rest mass of 1.6749286 x 10^-27 kilograms. Neutrons, like protons, are found in atomic nuclei. By themselves, neutrons are unstable and decay into a proton, electron, and antineutrino through the beta minus decay process. See also
A baryon that carries no charge. It is made of two down quarks and one up quark. The neutron is located in the nucleus and is "stuck" to the protons by the residual strong force. See also: nucleus, proton, quark, Journey - Neutron
A neutral particle of approximately unit mass, present in all atomic nuclei, except those of ordinary hydrogen. Neutrons are required to initiate the fission process, and large numbers of neutrons are produced by both fission and fusion reactions. See; Nucleus.
Particle in atomic nuclei. A neutron has no charge but a little more mass than the other constituent of atomic nuclei, the proton. Neutrons are made up of three quarks. If neutrons are not bound in an atomic nucleus they decay into a proton, an electron and an antineutrino.
A neutral elementary particle that occurs in the nuclei of elements (except ordinary hydrogen). Free neutrons decay into a proton, an electron and an anti-neutrino. A neutron is about 1,838 times heavier than an electron.
the most important of the subatomic particles because its capacity to pass through other atoms allowed for intense experimental bombardment of matter, leading to chain reactions of unbelievable force. (p. 927)
A particle with zero electric charge and a mass only slightly greater than that of the proton. Along with protons, neutrons are present in atomic nuclei (the only exception is the nucleus of hydrogen-1, which consists of a single proton).
A neutral particle found in the nucleus of atoms heavier than hydrogen. The rest mass of a neutron is slightly heavier than a proton. Free neutrons are unstable and undergo beta decay to produce a proton, an electron and an antineutrino with a mean lifetime of about 14 minutes. Neutrons are not fundamental but are baryons. A neutron is composed of one up and two down quarks, giving a net charge of zero.
One of the particles in an atomic nucleus. These particles have no electric charge, but they hold together the protons (positive particles in a nucleus), and account for roughly half of the particles in the nucleus. Neutrons are fermions, and are believed to form the majority of the matter in a neutron star.
One of the three fundamental particles which form atoms, the neutron has the mass of a proton but no electrical charge. Neutrons are emitted when large atomic nuclei are bombarded with alpha particles.
A neutral subatomic particle in the baryon family, having a mass 1,839 times that of the electron, stable when bound in an atomic nucleus, and having a mean lifetime of approx. 1.0 x 103 seconds as a free particle.
A neutron is a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen. ORIGIN Early 20th century. From neutral + -on.
A nuclear particle having a mass similar to a proton but having no electrical charge. During negative beta decay (-), a neutron disintegrates into a proton an electron and an anti-nuetrino which are then ejected from the nucleus. Neutrons can exist outside of the nucleus and have a high potential for radiation damage since they lose energy in biological materials through scattering. Shielding for neutron sources involves using materials containing large amounts of hydrogen.
An neutral hadron that is stable in the atomic nucleus but decays into a proton, an electron and an antineutrino with a half-life of 12 minutes outside of the nucleus. In the nucleus it has a rest mass slightly greater than the proton and a neutral charge.
A particle found in the nuclei of atoms, similar to a proton but with no electric charge. Among light nuclei (helium, carbon, nitrogen), the ones that are most stable contain equal numbers of protons and neutrons. In heavier elements, the most stable ones have majority of neutrons, growing with mass. Varieties of nuclei also exist ("isotopes") which have other ratios between their numbers of protons and neutrons, but when the departure from the "most stable ratio" becomes large, neutrons can convert to protons + electrons (or vice versa), producing one form of radioactivity.
A small particle possessing no electrical charge and typically found within an atom's nucleus. A neutron has about the same mass as a proton. [For additional information see Understanding Radiation: What is an Atom?.
An electrically neutral particle of mass essentially equal to that of the proton. A free neutron is unstable, decaying (with a half life of about 12 minutes) to an electron and a proton. (To say that the half life of a neutron is 12 minutes means that of a group of N neutrons, N/2 of them will decay before 12 minutes, and N/2 of them after 12 minutes.)
a small atomic particle possessing no electrical charge typically found within an atom's nucleus. Neutrons are, as the name implies, neutral in their charge. That is, they have neither a positive nor a negative charge. A neutron has about the same mass as a proton. See also alpha particle, beta particle, gamma ray, nucleon, x-ray.
A basic constituent of the atomic nucleus. The neutron is a fundamental particle, has a mass of 1.008664904 Â± 0.000000014 atomic mass units (939.56563 Â± 0.00028 MeV). Free, unbound neutrons are produced in fission and in some radioactive decay processes (especially beta decay). A free neutron is unstable, having a half life of 614.6Â±1.3 s and decaying by Î²- decay. The neutron is a hadron that is composed of three quarks, udd, and it has a spin-parity of 1/2+ and a magnetic moment of -1.91304275Â±0.00000045. Symbol: . Related to Bragg neutron. Related to neutron. Related to proton.
Neutron is an elementary particle on spin 1/2 and zero charge. The free neutron has a mean lifetime of 887 seconds. Neutrons and protons, which are collectively called nucleons, are the constituents of the nucleus.
an electrically neutral subatomic particle in the baryon family, having a mass 1,839 times that of the electron, stable when bound in an atomic nucleus, and having a mean lifetime of approximately 16.6 min. as a free particle.
A neutron is an uncharged particle found in the nucleus of an atom. A neutron, like a proton, contributes one atomic mass unit to the total atomic weight of an atom. ( www.studyisland.com) Neutrons are heavy nuclear particles with no electrical charge and approximately the same mass as protons. With protons, they are the principal components of atomic nuclei. They are composed of two "down" quarks and one "up" quark. www.mira.org/fts0/glossx.htm
an uncharged (neutral) elementary particle, stable when bound in an atomic nucleus and having a mean lifetime of about 12 minutes as a free particle (note: the neutron is found in all known elementary nuclei except for the hydrogen nuclei).
A baryon with electric charge zero; it is a fermion with a basic structure of two down quarks and one up quark (held together by gluons). The neutral component of an atomic nucleus is made from neutrons. Different isotopes of the same element are distinguished by having different numbers of neutrons in their nucleus.
Neutrons are part of the nucleus of an atom. Neutrons are, as the name implies, neutral in their charge. That is, they have neither a positive nor a negative charge. Neutrons are about the same size as protons. back to
An uncharged elementary particle found in the nucleus of every atom except hydrogen. Solitary mobile neutrons travelling at various speeds originate from fission reactions. Slow (thermal) neutrons can in turn readily cause fission in nuclei of "fissile" isotopes, e.g. U-235, Pu-239, U-233; and fast neutrons can cause fission in nuclei of "fertile" isotopes such as U-238, Pu-239. Sometimes atomic nuclei simply capture neutrons.
Neutron is a fictional comic book supervillain in the DC Comics universe, appearing usually as an adversary of Superman. He was created by Marv Wolfman and Joe Staton, and first appeared in Action Comics #525 (November 1981).