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**Relationship between Energy and Principal Quantum Number**

### Relationship between Energy and Principal Quantum Number

**Latex Code**:

**MathML Code**:

$E}_{n}=-{R}_{H}\left(\backslash frac1{n}^{2}\right)=\backslash frac-2.178\times {10}^{-18}{n}^{2}\mathrm{joule$ |

**MathType 5.0**: