Question

2. The electronic configurations of some elements is given below. With the help of provided electronic configuration, answer the following questions.

A = 1s2, 2s2, 2p, 3s

B = 1s2, 2s?, 2p%, 3s?, 3p6, 4s!

C = 1s7, 2s2, 2p5

D = 1s2, 2s2, 2p, 3s?, 3p5

1. Write the valency, period number, group number and block of the elements given above.

2. Which element is more reactive, C or D?​

Answer 1

Answer:

B = 1s2, 2s?, 2p%, 3s?, 3p6, 4s!

Explanation:

B = 1s2, 2s?, 2p%, 3s?, 3p6, 4s!the elements given above.

2.