Question

Which of the rule is violated while writting the ec of cu atom?

Answer 1

aufbau principle is violated The aufbau principle states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s shell is filled before the 2s subshell is occupied. In this way, the electrons of an atom or ion form the most stable electron configurationpossible