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it can range from 2 to thousands.

A molecule is the smallest particle of a compound that contains all the properties of that compound. It can also be the smallest particle of an element if the individual atoms would be otherwise unstable on their own.

The smallest molecule is that of gaseous Hydrogen - just two hydrogen atoms joined together.

Another simple molecule is that of water - just two hydrogen atoms and an oxygen atom joined together.

A more complex molecule is alcohol (ethanol) - 2 carbon atoms (C), 1 oxygen atom (O) and 6 hydrogen atoms (H) all joined together in this pattern:

CH3- CH2-O-H

Some molecules, however, especially molecules of protein, have several thousand atoms in them and are far too complex to describe here.

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Vincent Hilpert

Lvl 13
2y ago
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Wiki User

14y ago

One. There is one atom in a single bond and two electrons in a single bond.

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Q: How many atoms are in single molecules?
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