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