What Matter is Made of
Element: a basic building block of matter ; a pure substance that cannot be broken down into anything simpler.
Compound: a chemical combination of 2 or more elements into a single substance.
Atom: the smallest unit of an element that still has the properties of the element.
Proton: a particle with a positive charge in the nucleus of an atom.
Neutron: an uncharged particle in the nucleus of an atom.
Electron: a particle with a negative charge moving around the nucleus of an atom.
Nucleus: the dense center part of an atom.
Molecule: a group of more than one atom joined together that acts like a single participle.
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