Across
- 4. A group of atoms bonded together that make up the smallest unit in a chemical compound.
- 6. The graph that states every element and their properties
- 8. A variant of a certain element, caused by a change in the number of neutrons
- 10. Particles without a charge
- 12. Any substance that has mass and takes up space
- 13. Any group of atoms that form either a positive or negative net charge
- 14. The basic unit of all matter
- 15. A substance made up of atoms from two or more elements
Down
- 1. Any electron that is located in the outer shell of the atom
- 2. Credited with the creation of the periodic table
- 3. A pure substance that cannot be chemically broken down
- 5. Formed when two atoms share one or more pairs of electrons
- 7. A negatively charged particle with little mass and high amounts of energy
- 9. The center of an atom that holds most of it's mass
- 11. A particle located in the nucleus with a positive charge