01 About Hydrogen
The most abundant element in the universe - 75% of all normal matter. Powers the Sun via fusion.
02 Physical Properties
State at room temperature๐จ Gas
Melting point-259.1 ยฐC
Boiling point-252.9 ยฐC
Density0.0000899 g/cmยณ
Atomic mass1.008 u
Electron configuration1
Period / GroupPeriod 1, Group 1
BlockS-block
03 Discovery
Hydrogen was discovered in 1766 by Cavendish.