Question

Which is the correct outermost shell configuration of chromium :

Answer 1

The electron configuration for chromium is NOT  

1

s

2

2

s

2

2

p

6

3

s

2

3

p

6

3

d

4

4

s

2

, but  

1

s

2

2

s

2

2

p

6

3

s

2

3

p

6

3

d

5

4

s

1

.

Answer 2

The E.C. of chromiumis [Ar]3d5 As1