How many electrons can be described by the quantum numbers n = 7, l = 1?

As Principle Quantum Number is 7, so the number of Azimuthal Quantum Numbers for this energy level is calculated by following formula,

l = n - 1

As, n=7

So,

l = 7 - 1

l = 6

So, n=7 contains 1, 2, 3, 4, 5 and 6 Sub-Shells.

Number of Electrons in Subshells,

Number of electrons in each subshell is calculated by following formula,

2 (2l + 1)

As, l=1 (given),

So, 2 (2 (1) + 1)

2 (2 + 1)

2 (3)

6

Result:

The number of electrons in n=7 and l=1 are 6.