Question

What is Aufbau Principle ?​

Answer 1

Answer:

aufbau principle:

Explanation:

state that ground atom or ion electron filled in lower energy level before occupying higher energy level

example

1s subshell filled first before the 2s subshell occupied

Answer 2

Answer:

The aufbau principle, from the German Aufbauprinzip, also called the aufbau rule, 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 subshell is filled before the 2s subshell is occupied.