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Charge quantization is the principle that the charge of any object is an integer multiple of the elementary charge. Thus, an object's charge can be exactly 0 e, or exactly 1 e, −1 e, 2 e, etc., but not 1 / 2 e, or −3.8 e, etc. (There may be exceptions to this statement, depending on how "object" is defined; see below.)
Particles called quarks have smaller charges, multiples of 1 / 3 e, but they are found only combined in particles that have a charge that is an integer multiple of e. In the Standard Model, charge is an absolutely conserved quantum number. The proton has a charge of +e, and the electron has a charge of −e. Today, a negative charge is ...
The elementary charge e, i.e. the negative charge on a single electron or the positive charge on a single proton [3] 10 −18: atto-(aC) ~ 1.8755 × 10 −18 C: Planck charge [4] [5] 10 −17: 1.473 × 10 −17 C (92 e) – Positive charge on a uranium nucleus (derived: 92 x 1.602 × 10 −19 C) 10 −16: 1.344 × 10 −16 C: Charge on a dust ...
The total electric charge of the neutron is 0 e. This zero value has been tested experimentally, and the present experimental limit for the charge of the neutron is −2(8) × 10 −22 e, [6] or −3(13) × 10 −41 C. This value is consistent with zero, given the experimental uncertainties (indicated in parentheses).
All observable subatomic particles have their electric charge an integer multiple of the elementary charge. The Standard Model's quarks have "non-integer" electric charges, namely, multiple of 1 / 3 e , but quarks (and other combinations with non-integer electric charge) cannot be isolated due to color confinement .
[a] Thus, the neutron has a charge of 0 (zero), and therefore is electrically neutral; indeed, the term "neutron" comes from the fact that a neutron is electrically neutral. The masses of the proton and neutron are similar: for the proton it is 1.6726 × 10 −27 kg ( 938.27 MeV/ c 2 ), while for the neutron it is 1.6749 × 10 −27 kg ( 939.57 ...
Template that returns the number of neutrons of the most common isotope (or in cases where no characteristic isotopic abundance exists for that element, the number of neutrons for the longest-lived isotope) for an element given its name. All elements for which an isotope has been produced (up to oganesson) have been added.
Conversely, the proton-proton and neutron-neutron bound states are unstable and therefore rarely found in nature. The deuteron (the simplest p-n pair) does not have a spherical shape owing to its quadrupole moment. [5] The transverse charge density of the deuteron now confirms a prolate or elongated shape. [25]
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