atoms - Greek for "indivisible" An atom is the smallest part of matter, element - Made of one kind or type of atom. Oxygen is an example. , molecule - two or more atoms, nucleus - the center of an atom, proton - has a positive charge and is in the inside of an atom, electron - has a negative charge and moves around the outside of the nucleus, neutron - has a neutral charge, matter - Everything that occupies space and has mass. (solid, liquid, gas), a model - an example, like a picture or an object that represents something, Oxygen - O_____ is an example of an element. This element is made of one type of atom.,

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