Medium
Which statement is true regarding the hydrogen atom?
- AThe energy of the $3d$-orbital is lower than the energy of the $3p$-orbital.
- BThe energy of the $3p$-orbital is lower than the energy of the $3d$-orbital.
- CThe energy of $3s$ and $3p$-orbitals is lower than the energy of the $3d$-orbital.
- DAll $3s$,$3p$,and $3d$ orbitals have the same energy.
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