Search results
Results From The WOW.Com Content Network
A proton is a stable subatomic particle, symbol p, H +, or 1 H + with a positive electric charge of +1 e (elementary charge).Its mass is slightly less than the mass of a neutron and approximately 1836 times the mass of an electron (the proton-to-electron mass ratio).
proton mass 1.672 621 925 95 (52) ... and is strongly dependent on how those units are defined. For example, the atomic mass constant is exactly known ...
The proton mass m p is composed primarily of gluons, and of the quarks (the up quark and down quark) making up the proton. Hence m p , and therefore the ratio μ , are easily measurable consequences of the strong force .
The mass number of an isotope is the total number of nucleons (neutrons and protons collectively). Chemistry concerns itself with how electron sharing binds atoms into structures such as crystals and molecules. The subatomic particles considered important in the understanding of chemistry are the electron, the proton, and the neutron.
The atomic mass mostly comes from the combined mass of the protons and neutrons in the nucleus, with minor contributions from the electrons and nuclear binding energy. [1] The atomic mass of atoms, ions, or atomic nuclei is slightly less than the sum of the masses of their constituent protons, neutrons, and electrons, due to (per E = mc 2).
Most of the mass of a proton or neutron is the result of the strong interaction energy; the individual quarks provide only about 1% of the mass of a proton. At the range of 10 −15 m (1 femtometer , slightly more than the radius of a nucleon ), the strong force is approximately 100 times as strong as electromagnetism , 10 6 times as strong as ...
For premium support please call: 800-290-4726 more ways to reach us
For example, a proton has a mass of approximately 938 MeV/c 2, of which the rest mass of its three valence quarks only contributes about 9 MeV/c 2; much of the remainder can be attributed to the field energy of the gluons [83] [84] (see chiral symmetry breaking).