## energy with s,p,d,f

204929947
Posts: 76
Joined: Fri Apr 06, 2018 11:03 am

### energy with s,p,d,f

Can someone help me memorize the way in which the orbitals goes from largest energy to lowest energy?
For example, 4s^1,4s^2 ... like how do i know when the orbital is full? also how do i read the periodic table.. like how would i know whats next when my orbitals are full and i have more electrons?

Isobel Tweedt 1E
Posts: 31
Joined: Fri Apr 06, 2018 11:05 am

### Re: energy with s,p,d,f

I'm not sure I understand your whole question but here's some help on how to read the periodic table. If you look at the s-block there are only two columns, thus you can have 2s^1 2s^2 to get to Beryllium. So the 2 comes from row 2 and the ^1 and ^2 are the electrons (see columns). Similarly, in the d-block, you can have up to 10 electrons and 6 in the p-block.

Nandhini_2K
Posts: 60
Joined: Fri Apr 06, 2018 11:03 am

### Re: energy with s,p,d,f

It goes from s,p,d,f.
s holds 2 electrons
p holds 6 electrons
d holds 10 electrons
f holds 12 electrons
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Alicia Beebe
Posts: 37
Joined: Fri Apr 06, 2018 11:01 am

### Re: energy with s,p,d,f

Although there are ways to memorize it, i find it helpful to just think through it with the rules in mind. For example, if it was 1s, we know the principle quantum number is 1 and the subshell is s, meaning that l=0. Becuase l=0, m must also be 0. And then we know that there can be spin up or spin down. So based on the rule of no more than two electrons can have the same first three quantum numbers, we see that inly two electrons can be 1s. This may be longer, but this thought process gets you to the same results

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