PARTICLES in an ATOM

Name Mass Atomic Mass Mass # Charge
Electron 9.110 x 10 -28 g 0.0005486 u 0 -1
Proton 1.673 x 10 -24 g 1.007276 u 1 +1
Neutron 1.675 x 10 -24 g 1.008664 u 1 0

The mass of an electron is 1/1837 of the mass of a Hydrogen Atom.

The mass of a Proton is 1836/1837 of the mass of a Hydrogen Atom.

Each Atom is Electrically neutral

# ( number ) Electrons = # of Protons

When a Proton and a Neutron are very close to each other, there is a strong attraction between them referred to as the Nuclear Forces.



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