Quantum numbers

what is l

angular momentum quantum number

what is ms

electron spin ms = 1/2 or ms =-1/2

compare n and l

l <= n-1

what is ml

orientation in space quantum number

sublevels compared to l

s --> l = 0 p --> l = 1 d --> l = 2 f --> l = 3

subshells and their amount of electrons s: p: d: f: g:

s: 2 p: 6 d: 10 f: 14 g: 18

visualisation of s,p,d,f subshells on periodic table

see image

what are the sublevels for each energy level

see image: goes from n =1 -5

explain why Cr is element of lowest atomic number with half-filled subshell

this is because a 4s electron can come in and be the fifth electron in 3d shell COMMON MEANING: half-full d shells are particularly stable, so things in that are do stuff like move a s electron to the d shell to achieve it.

l compared to ml

-l <= ml <= l

how many electrons can fit in each orbital ml

2 electrons

how to calculate maximum number of electrons in an energy level n

2n^2