Question

An element X mass no 35 and no of neutron is 18 wrote the atomic no and electronic configuration of x also write group no valency and group of x

Answer 1

The element is chlorine.

Atomic no. - 17

Electronic Configuration- K  L  M  N

                                          2  8  7   -

Group no. - 17

Valency- (-1)

Answer 2

Atomic number=mass - no. of neutron

=35-18=17

Electronic configuration (2,8,7)

Valency=1

Group=17

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