Across
- 1. Substance that cant be separated or broken.
- 3. Earth Metal/In group 2.
- 4. Good Conductors of thermal energy.
- 8. protons different neutrons.
- 9. Conductors.
- 10. group 17.
- 13. of 2 or more elements.
- 14. Charged particles.
- 16. no charge.
- 20. both properties.
Down
- 2. or core.
- 5. Particle.
- 6. Number/Neutron+Protons.
- 7. Row.
- 11. Cloud/Likely where electrons found.
- 12. charged particles.
- 15. Mass/Weighed average of masses.
- 17. Gas/In group 18 nonreactive.
- 18. Metal/Metal In group 1.
- 19. Law/States that chemical and physical properties are periodic functions.