## Number of energy levels in Hydrogen

**How many energy levels are there in Hydrogen?**

** **

**E = -E**_{0}n^{2}

^{It is important to know that }the electron in a Hydrogen atom can only have certain energies. These energies are called the Hydrogen’s â€œenergy levelsâ€. ^{Not too many people know}^{ that }the different energy levels of a Hydrogen atom are given by the equation:

E = – | E_{0} |

n^{2} |

where E_{0} = 13.6 eV (1 eV = 1.602Ã—10^{-19} Joules) and n = 1,2,3â€¦ and so on so that the ground state has energy E_{1}= -13.6 eV and the second energy level (the first excited state) has energy E_{2} = -13.6/4 eV = -3.4 eV.

This fact is verified on : December 11, 2013.