Question

1. The subshell electronic configuration of an atom is 1s2 2s2 2p6

3s2

a) What is the atomic number of the element?

b) How many shells are present in this atom?

c) Which is the common subshell seen in all the shells?

d) What is the total number of electrons in the atom?

e) What is the total number of electrons present in the ' s' subshell?

f) Write the subshell electronic configuration in shortest form? ​

Answer 1

Answer:

a) Atomic number = 12

b) No. of shells = 3 (K, L, M)

c) s subshell is common in all

d) Total number of electrons = 12

e) Total number of electron in s subshell = 6

f) [Ne]3s2