Question

An element x. has mass number 35 and the number of neutrans is 18 identify the group number and period of x. Solve rhis answer

Answer 1

atomic no.=35-18
=17
electronic configuration:2,8,7
It belongs to 17th group and 3rd period

Answer 2

Atomic no. = 35 - 18 = 17
Element X is chlorine
Electron Configuration = 2,8,7
It has three shells so it would be in period 3
And in group 17