Question

chemistry questions​

Answer 1

a) Valency of B is 1 as it's configuration can be written as 2,1 (no of protons = atomic number)

b)Atomic mass of A is 10

Atomic mass of B is 8 (atomic mass = protons + neutrons)

c) There are no isotopes and isobars

d) C - 1s2 2s2 2p1 ( 2,3)

D - Is2 2s1 (2,1 )

Hope this helps !