Across
- 4. something that is made of all the same atoms or group of atoms
- 9. the relative size of things
- 10. a starting substance that is part of a chemical reaction
- 13. a group of atoms bonded together
- 14. the smallest unit of an element
- 15. a chart showing the arrangement of elements based on a repeating pattern of their chemical properties
- 17. the area around the nucleus where electrons quickly orbit
- 19. a subatomic particle in the nucleus that has a neutral charge
Down
- 1. to change the order or position of something
- 2. a change of matter from one form to another without a change in chemical properties
- 3. a change that occurs when one or more substances change into an entirely new substance with different properties
- 5. a positively charged subatomic particle in the nucleus of an atom
- 6. the amount of space an object takes up
- 7. a pure substance that cannot be separated or broken down into simper substances
- 8. a negatively charged subatomic particle orbiting the nucleus
- 11. a substance made of two or more elements
- 12. an ending substance that is made during a chemical reaction
- 13. anything that has mass and takes up space
- 16. something that can be observed about a substance such as color, smell, or boiling point
- 18. the ratio of the mass of a substance to its volume