Sciene

5. Shorthand statement of the elements in a substance showing the relative number of atoms of each kind of element.
6. bases that dissolve in water.
7. Large marsupial
9. Mixture of solute dissolved in a solvent. Solutions are clear but may be coloured.
11. A measure of the acidity or alkalinity or water, soil etc.
12. A chemical that reacts with a base to produce a salt and water.
17. Has a trunk
18. Substances that are dissolved in the solvent to form a solution.
19. Flying mammal
20. Chemical that starts to help or speed up a chemical reaction.

1. Very reactive metals in group 1 of the periodic table.
2. A reaction between an acid and a base.
3. A very small particle that makes up all things. Atoms have the same properties as the objects they make up.
4. A representation of a chemical reaction. It lists the reactants involved and the products formed.
8. Man's best friend
10. Scale from 1 (acidic) to 14 (basic) that measures how acidic or basic a substance is.
13. Likes to chase mice
14. A chemical substance that will react with an acid to produce a salt and water.
15. Neither acidic nor basic
16. The compound formed by the sharing of electrons.