The number of protons is what defines the element. Oxygen, for example, has eight protons. However, the number of neutrons in ...

One would therefore expect that heavy water, in which two atoms that are twice as heavy are bound to the oxygen atom, would differ significantly in its properties from normal water. In fact, however, ...

Each of its molecules contains two hydrogen atoms and one oxygen atom. There are very many different compounds and all compounds are molecules. Carbon dioxide is a compound of carbon and oxygen ...

The formula H₂O shows that water is made from two atoms of hydrogen (H) bonded to one atom of oxygen (O). Katie: Time for some science. And today it's a chemistry classic, the periodic table.

When two hydrogen atoms and an oxygen atom get close enough, the electron from each atom feels an attraction from the protons in the other atom's nucleus. This attraction pulls the atoms together. The ...

One would therefore expect that heavy water, in which two atoms that are twice as heavy are bound to the oxygen atom, would differ significantly in its properties from normal water. In fact ...