Question

Element with atomic no. 17 is placed in

Answer 1

Answer:

chlorine, symbol -cl and atomic mass is 35.45

Answer 2

Answer:

⤵⤵⤵

Group-17

Explanation-

#If the valence electron no is 1 or 2 then,the group no. is same as the no. of valence eletron.

#If the valence electron no is 3 to 8 then group no. is obtained by this formula-

Group no.=Valence electron +10

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