Question

If cobalt atom is available in form of 2 isotopes Co 30% and Co 70% calculate the average atomic mass of cobalt atom​

Answer 1

Answer:

Electronic configuration of

27

Co − 1s

2

2s

2

2p

6

3s

2

3p

6

3d

7

4s

2

Hence, Co has 3 unpaired electrons in 3d subshell.