The atomic number is 1and the Maas number is 1.00794u+0.00001u
It is in period 1 and group 1
It is the lightest element on the periodic table.
Hydrogen is the most abundant chemical substance in the universe constituting roughly 75%of all baryonic mass.
Uses of hydrogen
Pumping gas and fueling cars.
Hydrogen peroxide is used for cleaning cuts.
Hydrogen is used in the rocket to go into space.