Consider the hypothetical situation where the azimuthal quantum number, $$\ell$$, takes values 0, 1, 2, ......... n + 1. Where n is the principal quantum number. Then, the element with atomic number:

A

9 is the first alkali metal

B

13 has a half-filled valence subshell

C

8 is the first noble gas

D

6 has a 2p-valence subshell