Chemistry, asked by Anonymous, 11 months ago

Which of the given elements A,B,C,D and E with atomic number 2,3,7,10 and 30 respectively belong to the same period? Justify your answer.

Answers

Answered by tulsihebbar

1

Answer:

2 and 10

Explanation:

As both of them has valency same therefore they are in the same period

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