For a $d$-electron,the orbital angular momentum is:

The energy of atomic orbitals in a given shell follows the order:

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 ions does not have the same electronic configuration as $Ne$?

If $l = 3$,what is the number of orbitals and their type?

The number of radial nodes and angular nodes of a $4f$-orbital are respectively: