Question

1. The element placed below hydrogen in group 1 [LA). [Na, Li, K, F].​

Answer 1

Answer:

The element placed below Hydrogen in Group 1, is Lithium.

Li configuration : 1s2, 2s1,

Valency is 1.

Block : s block.

state : solid metal.

Answer 2

I configuration : 1s2, 2s1,

Valency is 1

Block : s block

state : solid metal