Chemistry, asked by ram337326, 4 months ago

the electronic configuration of an atom of an element is 2,8,7
find atomic no ,valency ,is it metal and non matal or no of period

Answers

Answered by psharma63860

1

Answer:

atomic no. 2+8+7=17

valency:-. -1

Non metal

Answered by udaykumardubey0

1

Answer:

atomic number -17 , valency=1, it is non metal period -3, group 17 and element is chlorine

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