Pauli's exclusion principle states that

The quantum numbers of six electrons are given below. Arrange them in order of increasing energies. If any of these combination$(s)$ has/have the same energy,list them:
$(1).$ $n=4, l=2, m_l=-2, m_s=-1/2$
$(2).$ $n=3, l=2, m_l=1, m_s=+1/2$
$(3).$ $n=4, l=1, m_l=0, m_s=+1/2$
$(4).$ $n=3, l=2, m_l=-2, m_s=-1/2$
$(5).$ $n=3, l=1, m_l=-1, m_s=+1/2$
$(6).$ $n=4, l=1, m_l=0, m_s=+1/2$

Which of the following outer electronic configurations represents argon?

The electron configuration of $Fe^{3+}$ is (atomic number of $Fe = 26$)

The quantum number $m$ of a free gaseous atom is associated with

The quantum numbers $+1/2$ and $-1/2$ for the electron spin represent