Question

2. Which of the following is the correct noble gas electron configuration for iron?
a. [Ar]3d5
b. [Ar] 4s23d6
c. [Kr]4s23d6
d[Kr]3d5

Answer 1

Answer:

The answer is: [Ar]3d6

Explanation:

After the 4 is full we automatically put the remaining six electrons in the 3d orbital.