Question

Pls help me find these questions..

Answer 1

Answer:

1.A) atomic no. of a = 12

                             b = 12

                             c = 11

                             d = 10

mass no. of  a = 24

                     b = 22

                     c = 22

                     d = 24

B) a = (2,8,2)

   b = (2,8,2)

   c =  

   d = (2,8)

atom (c) is wrong because the first shell cannot hold 3 electrons

Answer 2

Explanation:THE DIAGRAM OF ELEMENT C IS WRONG I.E. THE FIRST SHELL CANNOT HOLD 3 ELECTRONS.

Mass number :-

a. Mass number = no. of protons + no. of neutrons

= 12 + 12 = 24

b. 12 + 10 = 22

c.

d. 12 + 12 = 24

Electronic configuration :-

a.Electrons = 12

shells -. K L M

2, 8, 2

b. Electrons = 10

K L

2, 8

c.

d. Electrons = 12

K L M

2, 8, 2

Valency :-

a.) Valency = +2

b.) Valency = 0 ( it is an inert gas )

c.) Valency =

d.) Valency = +2

HOPE THIS ANSWER WILL HELP YOU AND PLEASE MARK THIS ANSWER THE BRAINLIEST ONE...