Chemistry Crossword

3. Positively charged particle located in the nucleus of an atom.
5. Slow chemical reaction that occurs when oxygen in the air reacts with a metal.
10. An atom that has lost or gained electrons to become electrically charged.
12. A group in the periodic table that is made up of the most stable and nonreactive elements.
13. A substance that reacts with another substance(s) to form a new substance with different properties.
14. An experiment where all of the products of a chemical reaction are accounted for.
15. A pure substance that has one type of atom and cannot be broken down.
17. Vertical column of elements in the periodic table
19. A group in the periodic table that is made up of the most reactive metals.
21. An organic catalyst that speeds up reaction in living beings.
22. Substance that speeds up a chemical reaction.

1. Number of protons in a nucleus of 1 atom of an element.
2. A physical property that determines how well a solid can be stretched into a wire.
4. An element that does not conduct electricity. Is dull & brittle.
6. An experiment where the products of a chemical reaction can escape.
7. A particle in the centre of an atom that is neutral.
8. An element in the periodic table with both metallic & non-metallic properties.
9. The centre of an atom that is positively charged with neutons & protons.
11. Fast chemical reaction that occurs when oxygen reacts with a substance and gives off heat.
14. A compound represented by symbols.
16. Invisible negatively charged particles that orbits an atoms nucleus.
18. A group of non-metals in the periodic table that are the most reactive.
20. Amount of mass in a given volume of a substance.
23. The smallest part of an element in which it represents. It is made up of a nucleus containing protons & neutrons.