Question

What is wrong with the notation 1s22s22p63s23p63d104s24p2 for germanium (atomic number 32)?

Answer 1

The notation is not written in the correct order as the 4s subshell should appear before the 3d subshell.
The correct order in an electron configuration would be: 
1s , 2s , 2p , 3s , 3p , 4s , 3d , 4p , 5s , 4d , 5p , 6s , 4f , 5d , 6p ,..
So, for germanium the electronic configuration should be;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p²