Question

1} Write the name and electronic configuration of the elements in which electrons enter into 3d subshell .

2} why does chromium have configuration of the type 3d⁵ 4s¹ instead of 3d⁴ 4s² ❓?​

Answer 1

Answer:

concept:

group number⇒no. of valence electron

period number⇒no. of shells

the subshell electronic configuration is

1s

2

2s

2

2p

6

3s

2

3p

6

3d

6

4s

2