Across
- 3. 2 or more atoms chemically combined
- 5. group bordering the zigzag line on the periodic table
- 6. positive ion
- 8. bond a bond between only nonmetals; no ions
- 12. center of the atom; contains protons and neutrons
- 13. 2 or more atoms physically combined
- 15. when light slows down when passing through a new substance
- 16. basic unit of life
Down
- 1. sound waves (the type of wave they are)
- 2. group to the right of the zigzag line on the periodic table
- 4. negative ion
- 7. group to the left of the zigzag line on the periodic table
- 9. wave that does not require a medium
- 10. heat transfer through direct contact
- 11. newton's law of inertia (the number)
- 14. bond a bond between a metal and a nonmetal