Answer to Question #98437 in General Chemistry for Brittany Wallace

Question

1. Which of the following combinations of quantum numbers is not allowed?
a. n = 3, l = 0, ml = 0, ms = -1/2
b. n = 2, l = 1, ml = -1, ms =1/2
c. n = 4, l = 3, ml = -2, ms = -1/2
d. n = 1, l = 1, ml = 0, ms =1/2
e. n = 4, l = 2, ml = 0, ms = 1/2

2. What is the maximum number of electrons that can be identified with the following set of quantum numbers: n = 2, ℓ = 0?

3. Choose the block of the periodic table where selenium is located.

Answer 1

1.n can take values 0,1,2,3...

l can take values from 0 to n-1

m can take values from -l to 0 to l

s can take values +1/2 and -1/2

Using all these we can conclude that option (d) is not allowed as n=l which is not possible.

2.maximum no of electrons is 2 as m can take only one value i.e. 0 and can have spin +1/2 and -1/2.

3.p block