Question

1) the number of protons or electrons in an atom is called................... of that atom.
2) the number of protons and neutrons in an atom is called..................... of that atom.
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Answer 1

Answer:

2) atomic mass

1) atomic number....

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Answer 2

Your answers are on this way!

1) Atomic number of atom (Z)

2) Mass number of atom (A)

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