Question

what valency will be shown by the elements a b c d and e having atomic numbers 2 4 8 10 and 30 respectively​

Answer 1

for element a which has atomic no. 2
valency '0' bcz it is stable

for element b which has atomic no. 4
valency '2'

for element c which has atomic no. 8
valency '2'

for element d which has atomic no.10
valency '0'

for element r which has atomic no. 30
valency '2'

Answer 2

C has an valency of 2 Ahas a valency of 0 B has a valency of 2 D has a valency of 0