Across
- 8. composed mostly of protons and neutrons
- 9. only stable group on the periodic table
- 10. max number of electron the second level will hold in a bohr model
- 11. Before the reaction is called
- 14. group of atoms bonded together
- 18. mixture that has large particle size and unevenly distributed
- 20. positive charged particles
- 21. contains two or more substances that are not chemically combined.
Down
- 1. group that makes up the most reactive metals
- 2. mixture that has small particle size and evenly distributed.
- 3. modern today periodic table is arrange by this
- 4. share properties of both metals and nonmetals; separates the periodic table
- 5. no charge or neutral particles
- 6. elements that have the same number of valence electrons are located in the same _____.
- 7. elements that have the same number of energy shells or levels are located in same ____.
- 12. matter that has only one type of atom
- 13. max number of electrons the inner level will hold on a bohr model
- 15. negative charged particles
- 16. The Law of Conservation of Matter states that matter cannot be created nor ______.
- 17. after the reaction is called
- 19. smallest piece of matter