Question

The mass number of an element is 7 and its atomic number is 3
(a) find the number of electrons
(b) find the number of neutrons
(c) write the electronic configuration​

Answer 1

Answer:Atomic number of element is 16.

No. of electrons = 16

No. Of protons= 16

No. Of neutrons =mass number - atomic number

= 32-16

= 16

Explanation:

Answer 2

Answer:

(a)3

(b)4

(c)2,1

Explanation:

(a)no. of protons = atomic no.

    no. of protons = no. of electrons (neutral)

(b)no. of neutrons = mass no. - atomic no.

(c)electronic configuration is arrangement of electrons in atom

hope it helps!!!!!!