Across
- 2. the smallest unit, consisting of a group of atoms, into which a substance can be divided without a change in its chemical nature
- 4. measurement of the level of acid or alkali in a solution or substance. In the pH range of 0 to 14 a reading of below 7 shows an acid and of above 7 shows an alkali.
- 5. a substance that takes part in and is changed by a chemical reaction
- 6. a substance dissolved in another substance, usually the component of a solution present in the lesser amount.
- 8. a liquid with very small pieces of solid matter floating in it; the state of such a liquid
- 11. any mixture of liquids that do not normally mix together, such as oil and water
- 13. a chemical, usually a liquid, that contains hydrogen and has a pH of less than seven. The hydrogen can be replaced by a metal to form a salt.
Down
- 1. a solid substance that has been separated from a liquid in a chemical process
- 2. a combination of two or more substances that mix together without any chemical reaction taking place
- 3. a substance that makes a chemical reaction happen faster without being changed itself.
- 7. a substance formed by a chemical reaction of two or more elements in fixed amounts relative to each other
- 8. a liquid in which something is dissolved
- 9. a measurement of the power of an atom to combine with others, by the number of hydrogen atoms it can combine with or displace
- 10. a substance used to cause a chemical reaction, especially in order to find out if another substance is present
- 12. a substance, especially a liquid, that can dissolve another substance