The ground-state electronic configurations listed here are incorrect. Explain what mistake have been made in each and write the correct electronic configurations Al : 1s^(2) 2s^(2) 2p^(4) 3s^(2) 3p^(3) " " B : 1s^(2) 2s^(2) 2p^(5) " " F : 1s^(2) 2s^(2) 2p^(6)

The ground-state electronic configurations listed here are incorrect.

1.	The ground-state electronic configurations listed here are incorrect. Explain what mistake have been made in each and write the correct electronic configurations Al : 1s^(2) 2s^(2) 2p^(4) 3s^(2) 3p^(3) " " B : 1s^(2) 2s^(2) 2p^(5) " " F : 1s^(2) 2s^(2) 2p^(6)
Answer» Solution :In `._(13)Al, 2p` should be filled first before FILLING of 3S starts Correct ELECTRONIC CONFIGURATION `= 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(1)` In `._(5)B`, TOTAL electrons = 5. Hence, E.C. `= 1s^(2) 2s^(2) 2p^(1)` In `._(9)F`, total electrons = 9. Hence, E.C. `= 1s^(2) 2s^(2) 2p^(5)`