Question

when the last electron of an atom was filled in the 3d subshell the subshell electronic configuration is 3d8.answer the questions:

A.complete subshell electronic configuration
B.atomic number
C.block
D.period​

Answer 1

Answer:

c. block

I think I help you

Answer 2

Option A is correct

Explanation :

Complete the electronic configuration is 1s

2

,2s

2

,2p

6

,3s

2

,3p

6

,3d

8

,4s

2

. and atomic number is 28.

Period number: 8+2=10, ∵ group number = No. of valence electron