Across
- 3. Who discovered the electron?
- 5. Protons held on inside while electrons move around them
- 7. Who discovered the neutron?
- 10. A single compound breaks down into 2 or more products
- 12. Arranged the periodic table based on mass
- 15. Shape created with 5 atoms
- 17. Negatively charged ion
- 18. Atoms of the same element with different amounts of neutrons
- 20. A property that does not depend on the amount of matter present
- 21. A property that depends on the amount of matter present
- 22. A model used to predict the geometry of molecules based on minimizing the electrostatic repulsion of a molecule's valence electrons around a central atom
- 23. 2 or more substances react to produce a single new substance
Down
- 1. A group of atoms that have a charge when together
- 2. Dissolves in water
- 4. Created by Rutherford and helped him discover the nucleus.
- 5. The ability of an atom to attract/pull in electrons
- 6. The distance from the nucleus to the boundary of the surrounding electron cloud
- 8. Positively charged ion
- 9. The energy necessary to remove an electron from a neutral atom
- 11. Has large particles floating; the only mixture that can be filtered
- 13. Heat energy is released
- 14. Used when naming covalent bonds
- 16. Heat energy is absorbed
- 19. Anything that can be separated using physical processes