Physics, asked by parthligade, 10 months ago

ements A,B,C,D and E have atomic numbers 4,9,13,17 and 20.
a) write their electronic cofiguration.
b) determine it's valency and identify the element.

Answers

Answered by PiyushManu

2

Answer:

A. 4 beriyllium

B.9 flourien

C.13

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