Q: When a lower energy level is ______ electrons are added to the next higher energy level.


Read this paragraph and choose the correct option from the provided answers:

Only when a lower energy level is full are electrons added to the next higher energy level. Electrons at higher energy levels, which are farther from the nucleus, have more energy. They also have more orbitals and greater possible numbers of electrons.

 Choices:

- unbalanced

- ready

- empty

- full


A:
full