# What is the atomic number for hydrogen?

##### 1 Answer
Mar 22, 2016

Atomic Number of Hydrogen = 1

#### Explanation:

This means that the number of protons in a hydrogen atom, represented by $Z$ , is equal to 1.

Furthermore, all isotopes of an element typically have the same number of protons and different number of neutrons. For example, protium, deuterium, and tritium are three isotopes of $H$ which all have $Z$= 1