Question

the electronic configuration of an element T is 2,8,7. 1)what is group no. and period no. of t​

Answer 1

Answer:

K shell- 2

L shell-8

M shell-7

Total number of electrons=2+8+7

=17

Hence the element is Chlorine

Group 17

Period 3

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Answer 2

Answer:

atomic no- 17

atom- chlorine

period number - 3

group number - 7A

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