What is the maximum number of electrons the innermost shell of an atom can hold?

1. Electrons fill shells according to fixed capacity rules. 2. The first and innermost shell can hold no more than two electrons. 3. That limit is called the doublet rule. 4. The octet rule, giving a maximum of eight, applies to the shells beyond the first. 5. Answering 8 is exactly that confusion between the doublet and the octet rule. _Source: NECTA CSEE 2022 Chemistry 032, Question 1: Multiple Choice Items, item (ii)_