Across
- 3. A system of arranging elements based on the structure of their atoms. (2 words - 8 and 5)
- 5. An irreversible change that occurs when two or more substances react with each other to form a new substance. (2 words - 8 and 6)
- 6. a change that occurs when atoms and molecules speed up or slow down. (8)
- 9. ______________of matter; solid or liquid or gas.(6)
- 10. The number of protons in a single atom of an element. (2 words, 6 and 6)
- 14. Matter that is made of only one type of molecule or atom. (2 words - 4 and 8)
- 15. A pure substance that is made of a single type of atom. (7)
Down
- 1. How we can describe an element such as colour, melting/boiling/freezing point or thermal and electrical conductivity. (10)
- 2. The state of matter with the slowest moving particles. (5)
- 4. The smallest units of matter. (5)
- 5. A substance that is formed when two or more elements are chemically bonded together. (8)
- 7. The ordered arrangement of atoms or molecules. (2 words, 10 and 9)
- 8. The state of matter with the fastest moving particles. (3)
- 11. These are formed when two or more atoms are chemically bonded together. (9)
- 12. A compound created when metal reacts with oxygen and water. (4)
- 13. As in protons and neutrons and electrons. (9)