Question

An element A has atomic no.19 without identifying the element, answer the following;

1. Electronic configuration of "A".

Valency of "A"?

2.A is metallic or nonmetallic in nature.

3. Name the group to which element "A" belongs. Write the formula of its hydroxide & oxide.​

Answer 1

Answer:

the element A which has atomic no 19 is POTASSIUM .

1. electronic configuration is 1s² 2s²2p∧6 3s² 3p∧6 4s∧1

2 . A  is metallic .

3. it belongs to 4 th period and 1st group .

hope it helps

thank you