Answer:
1) Liquid hydrogen has the lowest density of any liquid.
2) Hydrogen is the chemical element with the symbol H.
3) Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.
4) Atomic mass: 1.00784 u
5) Atomic number: 1
Their are both different substances
Created the Grand Canyon National Game Preserve and killed the deers predators.
Marine mammals breed by having coitus
Hope this helps :)
