Question

how many electrons in an atom may have the following quantum number?
l=2 m=5​

Answer 1

Answer:

The Maximum no of electrons in 4th energy level =2×n

2

=2×4

2

=32 electrons

In 32 electrons half the electrons have m

s

=−

2

1

and the other have m

s

=+

2

1

So total no of electrons having n = 4 and m

s

=−

2

1

is

2

1

×32=16

Answer 2

Explanation:

Therefore, the total number of electrons for n= 4 shells having -1/2 spin will be 16. As mentioned, l = 0 means s orbital, so it is a 3s orbital. Then, the number of electrons in 3s orbital is 2.