An element has mass number = 35 and atomic number = 17 ind (i) The number of neutrons in the element,

Question

An element has mass number = 35 and atomic number = 17 find

(i) The number of neutrons in the element, 

(ii) The number of electrons in the outermost shell.

Answer 1

Mass number given = 35

Atomic number of element = 17 

(i) Neutrons = 35 – 17 = 18 

(ii) To ind number of electrons in outermost shell we will have to ind the electronic configuration of the element. For atomic number 17, 

K = 2 

L = 8 

M = 7 

The number of electrons as we can see from the electronic configuration is 7.