Which of the following subshells can have a maximum of 2 electrons?

p

s

d

f

It is the s-orbital because the order of electrons is s-block, p-block, d-block, and f-block. The p, d, and I think f as well (not 100% about f though) can each hold 8 more valence electrons in their shells.

It’s "S" trust me I’ve done this since the 6th grade