The shape of $d_{xy}$ orbital will be

The incorrect set of quantum numbers $(n, l, m, s)$ for an electron in $3p$ orbital is

In a multielectron atom,which of the following orbitals described by three quantum numbers will have the same energy in the absence of electric and magnetic fields?
$A: n=1, \ell=0, m_{\ell}=0$
$B: n=2, \ell=0, m_{\ell}=0$
$C: n=2, \ell=1, m_{\ell}=1$
$D: n=3, \ell=2, m_{\ell}=1$
$E: n=3, \ell=2, m_{\ell}=0$
Choose the correct answer from the options given below:

"No two electrons in an atom can have the same set of all four quantum numbers." This principle is called:

Which of the following is the correct electronic configuration of $Cr$?

Choose the correct alternatives. The number of unpaired electrons in an atom of: