Across
- 5. The building blocks of matter
- 6. Vertical column on the periodic table
- 8. Pure substance that cannot be broken down into other substances by physical or chemical means
- 9. Positively charged particle in the nucleus of an atom
- 10. An electrical attraction between two oppositely charged atoms or groups of atoms called ions
- 12. Neutral particle in the nucleus of an atom
Down
- 1. Two or more different elements combined
- 2. Chemical bond that forms when electrons are shared
- 3. Atom of the same element with a different number of neutrons
- 4. Negatively charged particles located outside of the nucleus
- 7. Horizontal row on the periodic table
- 11. Atom that has lost of gained one or more elctrons
- 13. The center of an atom