How do you distinguish between atoms and molecules?
An atom is the smallest part of an element. A molecule consists of two or more atoms.
For example, helium consists of only
They are the smallest part of helium that can exist and still be considered helium.
Substances that contain more than one atom are called molecules.
Some common examples are hydrogen (
If the molecules consist of only one type of atom, we call them elements.
Other molecules are nitrogen monoxide (
Molecules that consist of more than one type of atom are called compounds.