what is a subshell?

 

is it a orbit?

there are many types, classified as S,P,D and F

 

each can hold 2 electrons each. there can be a maximum of 1 S, 3 P, 5 D and 7 F orbitals.

 

i have loads of homework to do tonight so that's all i'll say for now

Sub shells are denoted as s, p, d, f as already mentioned. They correspond to the quantum number l - the angular momentum quantum number. s corresponds to l=0, p to l=1, d to l=2 and f to l=3. In general a sub shell has 2l-1 orbitals where ech orbital has 2 electrons.

 

2 imp points :-

1) any 2 electrons with same value of l have same orbital angular momentum

2) for atoms other than hydrogen energy of electron also depends on l

also, in orbitals, one electron has a "spin" in one direction, and the other electron has a "spin" in the opposite direction

also, in orbitals, one electron has a "spin" in one direction, and the other electron has a "spin" in the opposite direction

 

That's within each sublevel, given by the magnetic quantum number. As Pulkit noted, there are magnetic 2l-1 sublevels. Within each sublevel there are the spin up and spin down orientations.