Which of the following sets of quantum numbers is not correct?

  • A
    $n = 2, l = 0, m = 0, s = +\frac{1}{2}$
  • B
    $n = 4, l = 3, m = +2, s = +\frac{1}{2}$
  • C
    $n = 2, l = 2, m = 0, s = -\frac{1}{2}$
  • D
    None of these

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Which of the following sets of quantum numbers is not valid?

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The quantum numbers of six electrons are given below. Arrange them in order of increasing energy. If any of these combinations 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 is the correct order of increasing energy of the listed orbitals in the atom of titanium? (At. no. $Z = 22$)

An $e^-$ has a magnetic quantum number $(m_l)$ of $-3$. What is the minimum possible principal quantum number $(n)$ for this electron?

If the given four electronic configurations:
$(i)$ $n=4, l=1$
$(ii)$ $n=4, l=0$
$(iii)$ $n=3, l=2$
$(iv)$ $n=3, l=1$
are arranged in order of increasing energy, then the order will be:

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