Question

how may elements are present in :-
1. First period ?
2. second period ?
3. third period ?

Answer 1

Answer:

First period contains 2 elements and is called very short period. Second and third periods contain 8 elements each and are called as short periods.

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Answer 2

Answer:

1-two elements.

2-eight elements.

3-eight elements.

Explanation:

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