Number 92 is Uranium. There are also several that have been created artificially, but they disintegrate rapidly. Compounds or molecules Chemical compounds are combinations of elements. A chemical compound is a molecule . The words compound and molecule are essentially interchangeable.
Molecular forces hold compounds together.
The Carbon Dioxide molecule is an example of a compound . It is a combination of the elements Carbon and Oxygen. There are certain forces and rules that dictate what combinations of elements combine. Characteristics of atoms Atoms have special characteristics that relate to their chemical activity. The nucleus of the atom is made up of protons and neutrons.