# How many electrons can be described by the following quantum numbers: n=4, l = 3, m_(l) = -2, m_s = +1/2?

$\text{For a given atom, one electron ONLY......}$
A given electron is defined by FOUR quantum numbers...${n}_{\text{principle quantum number}}$, ${l}_{\text{azimuthal quantum number}}$, ${m}_{l \left(\text{magnetic quantum number}\right)}$, and ${m}_{s \left(\text{spin quantum number}\right)}$. The Pauli exclusion principle states that NO TWO electrons can have the same set of FOUR quantum numbers: electrons in the same orbital are differentiated by ${m}_{s} = \pm \frac{1}{2}$....