Question

answer this question

Answer 1

Hey mate,

1) 17th group
2) 3 is it's period
3)5valence electrons are there
4)it's valency is 1
5)it is a non-metal
6)there are 17, 17 protons and neutrons respectively.

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Answer 2

its chlorine,

group 17 , 3rd period , 7 valence electron , valency 1 , its a non metal , no. of proton = 17 and no. of neutron = 18..

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