Question

5. How to find out groups and periods class 10chemistry​

Answer 1

Answer:

Number of shells=Number of period

Number of group=Number of valence shells OR Number of valence shells +10.

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Answer 2

to find out which is period and group

Explanation:

in the table from up side to downwards it is know as periods and from lhs to rhs side in the table it is know as groups

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