Hy
dr
og
en
Atom
H2O___H2O___H2O___H2O___H2O___H2O___H2O___H2O___H2O___H2O___H2O___H2O___H2O_
At least 2 hydrogen atoms are neede to make up one H2O molecule. Hydrogen is an element since it is only one substance. On the right of the text is an H2O molecule the two small blue atoms are Hydrogen atoms.