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

What is an orbital? Explain the point and boundary surface diagram of orbitals.

The correct order of the penetration effect of different orbitals is ..........

The electronic configurations of ${}_{24}Cr$ and ${}_{29}Cu$ are abnormal because $:-$

The maximum number of electrons with principal quantum number $n = 3$ and spin quantum number $m_s = -1/2$ is:

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:
$(1).$ $n=4, l=2, m_l=-2, m_s=-1/2$
$(2).$ $n=3, l=2, m_l=1, m_s=+1/2$
$(3).$ $n=4, l=1, m_l=0, m_s=+1/2$
$(4).$ $n=3, l=2, m_l=-2, m_s=-1/2$
$(5).$ $n=3, l=1, m_l=-1, m_s=+1/2$
$(6).$ $n=4, l=1, m_l=0, m_s=+1/2$