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Electronics/Physics_of_electricity/Matter_and_atoms.md
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@ -37,4 +37,4 @@ tags: [physics]
### Atomic weight ### Atomic weight
* The atomic weight of an atom is its mass. * The atomic weight of an atom is its mass.
* The mass is determined by the number of protons and neutrons in the nucleus. * The mass is determined by the number of protons and neutrons in the nucleus.
* An electron $\frac{1}{1845}$ the mass of a proton. It's mass is so neglible that it is not considered attributable to the atomic weight. * An electron $\frac{1}{1845}$ the mass of a proton. Its mass is so neglible that it makes no marginal difference to the atomic weight and is not included.