Here are four different ways chemists use to show a molecule of ammonia. In the colored molecule models, nitrogen atoms are blue and hydrogen atoms are white.
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Windows to the Universe original artwork by Randy Russell.
Most things around us are made of groups of atoms connected together into packages called molecules.
Molecules are made from atoms of one or more elements. Some molecules are made of only one type of atom. Other molecules are very large and are made of hundreds of atoms.
Even large molecules are so small that you would not be able to see only one molecule of something. But when thousands of molecules are together, they might look like a glass of water, a tree or even your computer screen!
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