Question

An element "x"has mass number 35and the number of neutrons is 18. identify the group number and period ofx

Answer 1

group no. is 17
periodic no. is 3

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 ) .