Which observations are not explained by the electromagnetic theory of physics?

The energy of an electron in the ground state $(n=1)$ for $He^{+}$ ion is $-x \ J$. What is the energy for an electron in the $n=2$ state for $Be^{3+}$ ion in $J$?

The radii of the first,second,third,and fourth Bohr orbits of hydrogen are respectively:

Which of the following corresponds to the energy of a possible excited state of hydrogen (in $eV$)?

Calculate the radius of the first orbit of $Be^{3+}$. (in $pm$)

The energy of an electron in the first Bohr orbit of $H$-atom is $-13.6 \ eV$. The possible energy value of an electron in the first excited state of $Li^{2+}$ is (in $eV$)