Question

Which of the following quantum number combinations is not allowed in an atom?
n = 2, l = 1, mr = -1

n = 1, l = 1, m = 0

n = 8, l = 5, m = -4

n = 6, l = 3, m = 2

Answer 1

1.The three quantum numbers (n, l, and m) that describe an orbital are integers: 0, 1, 2, 3, and so on.
2.The principal quantum number (n) cannot be zero. The allowed values of n are therefore 1, 2, 3, 4, and so on.
3.The angular quantum number (l) can be any integer between 0 and n - 1. If n = 3, for example, l can be either 0, 1, or 2.
4.The magnetic quantum number (m) can be any integer between -l and +l. If l = 2, m can be either -2, -1, 0, +1, or +2.

Answer 2

Thanks

Answer 3

Hope it helped you figure it out.

Answer 4

I think so my answer was the second one... Is that correct?

Answer 5

@NoDino

Answer 6

I am pretty sure it is the second one. If you look at the rule "The magnetic quantum number (m) can be any integer between -l and +l. If l = 2, m can be either -2, -1, 0, +1, or +2."
I isn't 2, so M cannot be 0.

Answer 7

Ok awesome Thanks sooo much!!

Answer 8

You're Welcome. :)