Across
- 4. Atoms of the same element with different numbers of neutrons
- 6. The Center part of an atom
- 8. Smallest particle of an element that can enter into a chemical reaction
- 9. The mass of an object divided by its volume
- 11. Early Greek philosopher who proposed indivisible particles called atomos
- 15. Neutral particle in nucleus
- 16. Anything that has mass and takes up space
- 17. The numbers of protons in the nucleus of an atom
- 19. The one who Discovered the neutron
- 20. The force that holds two atoms together
Down
- 1. Proposed that electrons occupy quantized orbits
- 2. Negatively charged particle orbiting the nucleus
- 3. Group of atoms bonded together
- 5. A measurement of matter
- 7. A pure substance consisting of one type of atom
- 10. Scientist known for uncertainty principle
- 12. A charged atom
- 13. Connection between atoms
- 14. Positively charged particle in the nucleus
- 18. Scientist known for the plum pudding model of an atom