# Which of the following statements in relation to the hydrogen atom is correct?

1. A

3s, 3p and 3d orbitals all have the same energy

2. B

3s and 3p orbitals are of lower energy than 3d orbital

3. C

3p orbital is lower in energy than 3d orbital

4. D

3s orbital is lower in energy than 3p orbital

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### Solution:

Statement A in relation to the hydrogen atom is correct 3s, 3p and 3d orbitals all have the same energy

The energy of the hydrogen atom, which has a single electron and is in the state of $1{\mathrm{s}}^{1}$ will be the same for its 3s, 3p, and 3d orbitals as it is for its 15th orbital since the hydrogen atom only has one electron.

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