Question

An atom of an element Z has 22 neutrons and 18 protons in its nucleus. what are the (I) mass number. (ii) valence electron and(iii) Group number of Z​

Answer 1

Answer:

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Answer 2

Answer:

40, 0, 18 or zero

Explanation:

mass number=40

valence electron=0

Group number of Z=18 or zero