A= 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s²
B= 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹
which is correct Electronic configuration. Give reason ?
Answers
Answer:
The electronic
configuration of
iron is 1s,2s*2p,
3s3p 3d 4s2.
Option (B) is correct.
Explanation:
It is a chemical element with
symbol Fe.
The atomic number of
iron 26.
.Its mass number is 55.845 u
and atomic number is 26.
By mass , it is the most
common element of earth's
surface.
It has 2, 8, 14, 2 number of
electrons per shell. Therefore,
the electronic configuration of
iron is 1s2,2s 2p°,3s 3p 3d 4s?.
iron 26.
Its mass number is 55.845 u
and atomic number is 26.
By mass , it is the most
common element of earth's
surface.
.It has 2, 8, 14, 2 number of
electrons per shell. Therefore,
the electronic configuration of
iron is 1s,2s22p",3s3p°3d 4s
The shortest electronic
configuration is [Ar] 3d 4s2.
Hence the electronic configuration
of iron is 1s2,2s22p5,3s23p°3d 4s2