Question

atomic numbers of atoms

Answer 1

atomic number is defined as the number of protons present in an atom of an element.
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Answer 2

Answer:

Atomic number is the sum of protons and neutrons in an atom.

Atomic numbers of some important elements are:

Sodium - 23 u

Oxygen - 16 u

Nitrogen - 14 u

Chlorine - 35.5 u

Carbon - 12 u

Hydrogen- 1 u