What is the electronic configuration of $Cu$?

Number of unpaired electrons in $Fe^{+3}$ $(Z = 26)$ is

The graph showing the variation of probability density,$\psi^2(r)$ with the distance of the electron from the nucleus,$r$ is given below. This represents:

Although no currently known element contains electrons in $g$ orbitals in the ground state,it is possible that such an element will be found or that electrons in excited states of known elements could be in $g$ orbitals. For $g$ orbitals,$l = 4$. What is the lowest value of $n$ for which $g$ orbitals could exist? What are the possible values of $m_l$? How many electrons could a set of $g$ orbitals hold?

The $p_x$ orbital can accommodate:

Which of the following orbitals has a dumbbell shape?