Atoms are very small ... Key fact: isotopes are forms of an element that have the same number of protons but different numbers of neutrons. There are three isotopes of hydrogen: hydrogen ...

Key fact Isotopes are forms of an element that have the same number of protons but different numbers of neutrons. There are three isotopes of hydrogen: hydrogen, deuterium (hydrogen-2) and tritium ...

For example, the element tin has a magic number of protons. Tin always has 50 protons, and its most common isotope has 70 neutrons. Isotopes are atoms of the same element that have a different ...

Ions are attracted to other atoms and molecules ... when its nucleus contains too many or too few neutrons. Try to keep the same number of neutrons and protons as you build your atom.

The nucleus of each atom contains protons and neutrons. While the number of protons ... bonds and attractive forces of atoms with heavy stable isotopes are stronger than those in the more common, ...