## Midterm Question

Bijal Luhar
Posts: 33
Joined: Fri Apr 06, 2018 11:03 am

### Midterm Question

On the midterm one of the questions asked was what is the subshell notation and the amount of orbitals? What did they mean amount of orbitals?

Nicole Shak 1L
Posts: 35
Joined: Wed Nov 22, 2017 3:03 am

### Re: Midterm Question

Subshell notation is l, and orbital notation is ml. The amount of orbitals is the values of ml, so for example when l=2, this would be a d orbital, with ml=-2,-1,0,1,2. This has 5 orbitals.

OrAmar-1L
Posts: 35
Joined: Fri Sep 29, 2017 7:04 am

### Re: Midterm Question

Each group has a certain amount of orbitals. Since the s block only has 2 elements, it can only hold 2 electrons, and thus one orbital. The p block has 6 elements, so 6 electrons in 3 orbitals. D block has 10 elements, so 10 electrons in 5 orbitals. And the F block has 14 elements, so 14 electrons in 7 orbitals. Hope this helps!

Endri Dis 1J
Posts: 33
Joined: Fri Apr 06, 2018 11:02 am

### Re: Midterm Question

So to clarify, we didn't need include ms which is just the basic -1/2and +1/2?

YeseniaGomez_1L
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### Re: Midterm Question

Endri Dis 1J wrote:So to clarify, we didn't need include ms which is just the basic -1/2and +1/2?

No, I believe we didn't need to include ms (-1/2and +1/2)

Andrea- 3J
Posts: 56
Joined: Tue Nov 14, 2017 3:00 am

### Re: Midterm Question

Principle Quantum Number (n) indicated Valence Shell and it specifies on energy/size.
n=1,2,3,4... ****note:as you go down each period in the periodic table

Angular Momentum Quantum Number (l) indicates subshell and it specifies on shape.
l=0 corresponds to s & it has 1 orbital (2 electrons)
l=1 corresponds to p & it has 3 orbitals (6 electrons)
l=2 corresponds to d & it has 5 orbitals(10 electrons)
l=3 corresponds to f & it has 7 orbitals (14 electrons)

Magnetic Quantum Number (ml) indicates orbitals of subshell and it specifies on orientation.
s: ml=0
p: ml=-1,0,1
d: ml=-2,-1,0,1,2
f: ml=-3,-2,-1,0,1,2,3

Spin Quantum Number (ms) indicates spin state and specifies on spin direction.
+1/2 up (arrow)
-1/2 down (arrow)

Hopes this helps! I got this info from my plf!

Jennifer 1G
Posts: 29
Joined: Wed Nov 15, 2017 3:03 am

### Re: Midterm Question

I believe amount of orbitals is referring to how many ml values there are. During Friday's review session, it was stated that ml can be calculated using ml=2l+1. So being given or knowing the l value, you can find ml. I think the number ml gives is the number of orbitals.

Jacob Samuels 1E
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

### Re: Midterm Question

The amount of ml values is always 1 for s, 3 for p, 5 for d, and 7 for f

Gisselle Sainz 2F
Posts: 76
Joined: Wed Feb 21, 2018 3:00 am

### Re: Midterm Question

The type of orbital (s, p, d, f for instance) will let you know how many orbitals there are within different subshells.
There is 1 orbital for s
3 for p
5 for d
7 for f

Chem_Mod
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### Re: Midterm Question

The question was word for word from the homework.

Anyone recognize the other homework question?

ramayyala1G
Posts: 31
Joined: Fri Feb 02, 2018 3:02 am

### Re: Midterm Question

the easiest way to do this problem was to either know how many orbitals each subshell has or to apply the formula 2(l)+1 where if l=0 or the s subshell then, there are 2(0)+1 orbitals or 3 orbitals. This formula makes is very easy to find the orbitals. Or just count the ml numbers or count on the periodic table. Lots of ways to find out how many orbitals.

Endri Dis 1J
Posts: 33
Joined: Fri Apr 06, 2018 11:02 am

### Re: Midterm Question

Wasn't the dilution/ concentration one part of the video module questions?

Jennifer 1G
Posts: 29
Joined: Wed Nov 15, 2017 3:03 am

### Re: Midterm Question

Jacob Samuels 1E wrote:The amount of ml values is always 1 for s, 3 for p, 5 for d, and 7 for f

I believe the values you provided are actually l values!

Posts: 30
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### Re: Midterm Question

This question from the midterm was number 2.27 from the homework.