December 10, 2023, 09:24:12 AM
Forum Rules: Read This Before Posting

### Topic: Magnetic quantum number  (Read 2549 times)

0 Members and 1 Guest are viewing this topic.

#### Rutherford

• Sr. Member
• Posts: 1868
• Mole Snacks: +60/-29
• Gender:
##### Magnetic quantum number
« on: April 14, 2012, 08:39:36 AM »
What are the values of the magnetic quantum number for subshell p(l=1)? Are they -1,0,1 in this sequence?

#### XGen

• Full Member
• Posts: 127
• Mole Snacks: +9/-4
##### Re: Magnetic quantum number
« Reply #1 on: April 14, 2012, 01:07:14 PM »
I believe yes.

#### Rutherford

• Sr. Member
• Posts: 1868
• Mole Snacks: +60/-29
• Gender:
##### Re: Magnetic quantum number
« Reply #2 on: April 14, 2012, 02:50:14 PM »
Well, I was doing this problem:
Write the el. configuration of an atom, if his valent electrons have these properties:
n=4, l=0, ml=0, ms=+1/2
n=4, l=0, ml=0, ms=-1/2
n=4, l=1, ml=0, ms=+1/2
I thought that the configuration of the valent electrons would be: 4s2 4p2, but in the answer it is 4s2 4p1. I am really confused. How can that be right?

#### Borek

• Mr. pH
• Deity Member
• Posts: 27486
• Mole Snacks: +1787/-409
• Gender:
• I am known to be occasionally wrong.
##### Re: Magnetic quantum number
« Reply #3 on: April 14, 2012, 03:38:22 PM »
There are three electrons listed in the problem, why did you expect four?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### Rutherford

• Sr. Member
• Posts: 1868
• Mole Snacks: +60/-29
• Gender:
##### Re: Magnetic quantum number
« Reply #4 on: April 14, 2012, 04:01:12 PM »
Good point. But how can it be "4p1" if ml is 0? If I draw a p orbital diagram ml=0 is the middle box I suppose. So the ml=-1 box must be filled with 1 electron first and then the middle box.

#### Borek

• Mr. pH
• Deity Member
• Posts: 27486
• Mole Snacks: +1787/-409
• Gender:
• I am known to be occasionally wrong.
##### Re: Magnetic quantum number
« Reply #5 on: April 14, 2012, 04:32:44 PM »
No, there is no filling order of this type. We usually draw them starting with the left box, but it is just a meaningless convention.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### Rutherford

• Sr. Member
• Posts: 1868
• Mole Snacks: +60/-29
• Gender:
##### Re: Magnetic quantum number
« Reply #6 on: April 15, 2012, 04:26:56 AM »
Ok, thanks.