What Is the Maximum Amount of Electrons That Can Be Contained in Each Subshell?

What Is the Maximum Amount of Electrons That Can Be Contained in Each Subshell?

According to Wikipedia, each subshell can contain up to 4ℓ + 2 electrons, where ℓ stands for the azimuthal quantum number, characteristic for each subshell. Purdue University states that the value of ℓ is 0, 1, 2, 3 and 4 for subshells s, p, d, f and theoretical g.

According to Armstrong Atlantic State University, subshell s can hold up to two electrons, subshell p can contain six electrons at most, subshell d can be occupied by up to 10 electrons and subshell f can contain up to 14 electrons. In theory, subshell g could contain up to 18 electrons. However, no element with an O shell and a g subshell has been discovered as of 2014.