Question

In the lithium atom screening effect of valence shell
electron is caused by-
(1) Electrons of K and L shell
(2) Electrons of K shell
(3) Two electrons of 1st and one of 2nd shell
(4) None​

Answer 1

Answer:

option 1 us your ans

Explanation:

please mark as brainlist

Answer 2

Option 1

Explanation:

Electrons of K

shell causes screening effect in Lithium atom. (No L shell for lithium)