Hund's Rule

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[antgoblue]

According to Hund's rule of maximum spin multiplicity, how many singly-occupied orbitals are there in the valence shells of the following elements in their ground states? Enter your answer as the sum of all the orbitals 
A) silicon
B) manganese
C) neon
D) beryllium
E) germanium
F) potassium

Thanks!

[mr_cochran]

Do the same for your other post as well.

What is the principal quantum number of the s and p valence electrons in the following chemical elements?  A) silicon B) aluminum C) boron D) nitrogen E) calcium F) krypton.

Have you covered orbital notation or electron configuration in class yet?

A repost, with edit. Sorry.

[antgoblue]

Ye we/ve covered electron configuation

[mr_cochran]

I'm sorry, I screwed up my post.

Write an orbital notation for the elements and the answer will be obvious.Do the same for your other post as well.

What is the principal quantum number of the s and p valence electrons in the following chemical elements?  A) silicon B) aluminum C) boron D) nitrogen E) calcium F) krypton.

[antgoblue]

What exactly is orbital notation. Can i have an example?

[mr_cochran]

Texts have different names for it ; Zumdahl uses orbital diagram, Kotz uses obital box diagram. essential it is a notation for the electronic configuration using boxes for the orbitals; the s sublevel has one box, the p sublevel has 3 boxes, the d has 5 and the f has 7 with up and down arrow representing the positive and negative spin electrons

[antgoblue]

So then you look at preodic table, lokk what block each element is in and subtract hem?

Like this  Si p block =3
Al-p =3
B d =3
N p=3
Ca= s block=1
Kr=p block =3

then what?

[mr_cochran]

how many singly-occupied orbitals are there in the valence shells of the following elements in their ground states? Enter your answer as the sum of all the orbitals

                      electron configuration                           singly-occupied orbitals    sum of orbitals           
A) silicon          1s²  2s² 2p⁶  3s² 3p_x¹ 3p_y¹                    2                                 8
B) manganese    1s²  2s² 2p⁶ 2s²                                  0                                 6

You do the rest ...
C) neon
D) beryllium
E) germanium
F) potassium

Hope we've been of help to you.

[antgoblue]

THANK YOU VERY MUCH I GOT IT!!!!!!!!!!!!!!!!!!!!!!!!

[mr_cochran]

Glad we could help, tell your friends.