Across
- 6. A pure substance containing different elements chemically joined together
- 7. Describes a mixture that looks the same throughout
- 8. A simple stand-in that helps us understand a real object or process
- 9. The number of protons inside an atom of an element (2 words)
- 11. To pull objects with opposite charges towards each other
- 13. A number placed in front of a formula to show the number of particles
- 14. A positively charged particle found inside the nucleus
Down
- 1. Anything that has mass and takes up space
- 2. One of the substances that makes up a mixture
- 3. A scientific recipe showing which atoms are present and how many
- 4. The small central part of an atom
- 5. Particles equal in number to protons in a neutral atom
- 10. The type of charge carried by an electron
- 12. A tiny particle from which all matter is made
- 14. Describes matter containing only one type of particle