It is the smallest unit of matter.
Identify what is being described in the sentences below!
Choose [A] for atoms, and [M] for molecules!
It is the smallest unit of matter.
It is held by chemical bonds.
It is made up of two or more atoms of the same or different elements.
It is made up protons, neutrons and electrons.
It is not visible to the naked eye, but is visible through a magnifying microscope.