Across
- 5. proposed electrons orbit in energy levels.
- 6. has mass and takes up space.
- 7. Combination of substances not chemically bonded
- 9. First step of the scientific method
- 10. Unit of mass
- 13. Basic unit of matter
- 14. Pure substance with one type of atom
- 15. Formula is mass divided by volume
- 16. State of matter with definite shape and volume
- 17. State of matter with definite volume but no shape
- 18. Vertical column in the periodic table
- 20. example of not matter because it has no mass
- 21. State of matter that takes shape and volume of container
Down
- 1. studies interactions between chemicals and the environment.
- 2. An educated guess in the scientific method
- 3. Branch of chemistry studying living organisms
- 4. Negatively charged particle in an atom
- 8. Substance made of two or more elements
- 11. Horizontal row in the periodic table
- 12. studies the composition, structure, properties, and changes of matter
- 19. State of matter found in lightning