Across
- 3. The form that matter has
- 5. A form of matter that has no definite shape or volume
- 7. A tiny particle in the nucleus of an atom
- 8. A form of matter that has a definite shape and volume
- 12. A form of matter that has no definite volume but no definite shape
- 13. A tiny particle of an atom that moves around the nucleus
- 14. A very hot gas made from particles that have an electric charge
- 15. The smallest particle of a substance that has the same properties
- 16. A picture, an idea, or an object that is built to explain how something else looks or works
Down
- 1. Matter that has only one kind of atom
- 2. A substance that is formed when atoms of two or more elements join together
- 4. A number equal to the sum of protons and neutrons in an atop of an element
- 6. A number equal to the number of protons in the nucleus of an atom
- 7. An element found in nature
- 9. The building block of matter
- 10. The central part of an atom
- 11. A tiny particle in the nucleus of an atom
