Question

how many electrons are able to be in the second shell (layer) of an atom?
2
6
8
18

Explanation:

The formula to calculate the maximum number of electrons in a shell is \(2n^{2}\), where \(n\) is the shell number. For the second shell, \(n = 2\), so \(2\times2^{2}=8\). Also, the second shell has \(s\) and \(p\) sub - shells. The \(s\) sub - shell can hold 2 electrons and the \(p\) sub - shell can hold 6 electrons, totaling 8 electrons.

Answer:

C. 8