Question

5.
A. The electronic configuration of some
elements are given below:
a. 1s? b. 1s 2s 2p
In which group and period of the
periodic table they are placed ?​

Answer 1

Answer:

a= he and b = Ne

Explanation:

he ( helium) and Ne ( Neon)

By using Aabau rule.

.

Answer 2

Answer:

ist group

a is hydrogen

hope it helps