Question

An element x has mass number 35 and number of neutrons 18 write atomic number and

Answer 1

atomic number =35-18

atomic number=17

element=chlorine

electronic configuration=2,8,7

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 ) .