Across
- 2. Substance formed by a chemical reaction (right side).
- 5. A pure substance made of only one kind of atom.
- 7. An atom that has gained or lost electrons, acquiring a charge.
- 8. Subatomic particle with no charge (neutral).
- 9. A measure of the amount of matter in an object.
Down
- 1. A symbolic representation of a chemical change.
- 2. Subatomic particle with a positive charge located in the nucleus.
- 3. The starting substances in a reaction (left side).
- 4. The horizontal rows on the periodic table.
- 5. Negatively charged particle that orbits the nucleus.
- 6. The vertical columns on the periodic table.
- 8. The center of an atom, containing protons and neutrons.