Hydrogen

Atomic symbol: H
Atomic number: 1
Atomic mass: 1.01

Appearance: colorless gas at 25°C

Group: 1
Period: 1
Series: reactive nonmetal
Block: s
Electron configuration: 1s¹

Most abundant element in the universe.

Most common isotope is H^+^ where hydrogen has 1 proton and 0 neutrons.

Fun Fact! About 10% of the mass of the human body is made up of hydrogen.

Picture of Hydrogen