Vocabulary #6

1. element: a basic bulding block of matter; a pure substance that cannot be broken down into anything simpler.
2. compound: a chemical combination of two or more elements into a single substance.
3. atom: the smallest unit of an element that still has properties of the smallest.
4. proton: a particle with a positive charge in the nucleus of an atom.

5. neutron: an uncharged particle in the nucleus of an atom.
6. electron: a particle with a negative charge moving around the nucleus of an atom.
7. nucleus: the dense center part of an atom.

8. molecule: a group of more than one atom joined together that acts like a single particle.