About 98% of the mass of the universe is made up of only two types of atoms: hydrogen and helium. That’s because these two elements make up stars like our sun and most of the stars in the universe.

Atoms can form strong bonds with each other, making molecules. Symbols and formulae Letters from the alphabet are used to represent chemical elements. An element’s chemical symbol is a single ...

The answer, says Fadi Abdeljawad, an associate professor of materials science and ... "scientists can design better nanocrystalline alloys. They can choose specific elements that will go to ...