Chemistry

2. huge long-chain molecules
4. the opposite of an acid
8. the method by which highly reactive metals are extracted
10. an example is ethanol
12. rocks which metals have to be extracted from
13. unsaturated hydrocarbons
14. we use the pH scale to measure how strong it is
15. atoms with the same number of protons and electrons but different numbers of neutrons
16. a bond where electrons are given to other atoms that both have a full outer shell
17. a bond where electrons are shared
18. the formula is CnH2n+2
19. type of variable that can be described using words

1. evidence/data that actually measures what you are investigating
3. similar results can be obtained by the same person when the experiment is repeated
5. using instructions provided, other people can obtain similar results using their own equipment
6. a unit to measure the number of particles in a substance
7. have the same formula but the atoms are arranged differently
9. a soluble base
11. a molecule that only contains hydrogen and carbon