helium
Nitrogen
It is nitrogen and it makes more than 78% of the air.
Hydrogen is 71% of the sun.
This element is calcium. It is the fifth most abundant element in the Earth's crust and makes up more than 3 percent of the crust. It reacts with water and belongs to the 2nd group of the periodic table.
Hydrogen makes up more than 60 percent of a typical star's composition. Through nuclear fusion, hydrogen is converted into helium, releasing energy in the process.
water
china
Uranium is a chemical element, not a compound.
Bacteria.
Protein
Protein
water