Year 8 Chemistry

5. A stable subatomic particle occurring in all atomic nuclei.
6. Means Shiny
8. is a substance that is chemically joined or exists as its own element.
10. A change in matter that does not form new substances
12. Rust
16. A liquid mixture with a solute and solvent.
18. Means Stretchy
21. A change in matter that forms one or more new substances.
22. two or more elements that have chemically joined together.
27. Things that make up an object
29. Alloy a mixture of two or more metals, and may even include non metal elements.
30. are the smallest blocks of matter that form all our objects - these are made out of individual atoms!
31. is a chemical reaction with a Hydrocarbon and oxygen to produce Carbon dioxide and water. This reaction releases heat and light.

1. A combination of substances that can be physically separated.
2. The new substances formed by a reaction are called
3. able to dissolve in other substances
4. hold molecules together and create temporary connections that are essential to life.
7. In all living cells, Oxygen reacts with sugar to produce Carbon dioxide and water.
9. a chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances.
11. What we breathe out
13. the minor component in a solution, dissolved in the solvent
14. Meaning flat and bendy
15. is a reaction that combines Carbon dioxide and water to produce Sugar and Oxygen under the presence of Sunlight.
17. A subatomic particle of about the same mass as a proton but without an electric charge.
19. is a reaction with metals and oxygen to produce a metal oxide. This is a very slow reaction.
20. An attractive force that holds two atoms together
23. Atoms with the same number of protons and electrons make one
24. The substances that react with each other are called
25. A group of atoms bonded together
26. The smallest particle of an element
28. Will react with a metal to produce a metal salt hydrogen.