Question

how many m value are possible for /=3​

Answer 1

Answer:

Well, your set of quantum numbers is not "allowed" for a particular electron because of the value you have for  

l

, the angular momentum quantum number.

The values the angular momentum quantum number is allowed to take go from zero to  

n-1

,  

n

being the principal quantum number.

So, in your case, if  

n

is equal to 3, the values  

l

must take are 0, 1, and 2. Since  

l

is listed as having the value 3, this puts it outside the allowed range.

The value for  

m

l

can exist, since  

m

l

, the **magnetic quantum number, ranges from  

−

l

, to  

+l

.

Likewise,  

m

s

, the spin quantum number, has an acceptable value, since it can only be  

−

1/2

or  

+

1/2

.

Therefore, the only value in your set that is not allowed for a quantum number is  

l

=

3

.

Explanation: