Question

anser whole parts in the question

Answer 1

11.

1)K(2,8,8,1)

2)Be and Ca in 2 group

K(19) and X(2,8,7)

K(2,8,8,1) and X(2,8,7)

charge at K is +1

and X is -1

so there compound will be

KX
and nature of KX will be metal compound and it will be neutral.