Across
- 3. Combination of two or more atoms help together by covalent bonds.
- 9. Suspension of small, solid particles formed during a chemical reaction.
- 12. Subatomic particle that is neutral.
- 14. Ability to be beaten or rolled into sheets without crumbling.
- 15. Two elements combine to form a compound.
- 16. Substance that has a pH of less than 7.
- 18. Substance that has a pH of more than 7.
- 20. Subatomic particle that has a negative charge.
Down
- 1. Cloud-like energy level that surrounds the nucleus of an atom; occupied by one or more electrons.
- 2. Coloured non-metals that are very reactive.
- 4. Pure substance made from two or more elements that are combined together chemically.
- 5. Central core in an atom composed of protons and neutrons.
- 6. Combination or pure substances.
- 7. Chemical reaction between an acid and a base that produces water and a salt.
- 8. Subatomic particle that has a positive charge.
- 10. Chemical reaction in which a compound or element rapidly combines with oxygen gas.
- 11. Substance that has a pH of 7.
- 13. Anything that has mass and takes up space.
- 17. An atom or a group of atoms that has a positive or negative charge.
- 19. Substance that cannot be broken down into any simpler substance by chemical means.