Question

An element "x" has mass numbers 35 and the number of neutrons, is 18. Identify the group number and period for "x"

Answer 1

chlorine is the element of atomic no.17 .as we know A= z+N. then N=18 and A=35 then A-N=z

Answer 2

Answer:

We know :

Atomic number = Mass number - No. of neutrons.

Atomic number = 35 - 18

= > 17

Electronic configuration :

2 , 8 , 7

Group no. = 17

Period no. = 3

Name of element is Chlorine (  Cl ) .