What is wrong with the following electron configurations a

Last updated: 5/1/2023

What is wrong with the following electron configurations a 1s 2s 2p b 1s 2s 2p Includ TsOd 3s 3p6 4s 3d8 4p6 5s c 1s 2s 2p 3s 3p6 4s 3d 0 4p6 4d 0 5s otnoj odr bidin molboe