Chemistry Crossword

3. / A reaction that occurs when elements in different compounds displace each other, creating two new compounds
5. / When a substance is neither acidic or basic, with a pH of 7 on the pH scale, it is _________
6. / A incomplete combustion happens when the oxygen supply is ________
8. / The name of the compound MgO
9. / Both acids and bases are __________ solutions that conduct electricity
10. / The name of the compound OH
11. / _______ is made of one or more positive metals and one or more negative non-metals
16. / A substance that changes colours depending on whether it is acid or base
18. / The soft, silver, highly reactive metal in group 1
19. / A particle which are joining by covalent bonds

1. / The law of conservation of mass states that in a chemical reaction, the total mass of the reactants has to ______ the total mass of the products
2. / A new color appearing is a ________ change
4. / A substance with the pH of 9 is less ______ than a substance with a pH of 11
5. / Elements in group 18 that are not reactive
7. / The name of the compound SO
12. / A covalent bond is formed when the otuer electrons are shared between one or more ________
13. / The breakdown of a metal from reactions with the chemicals in the environment.
14. / Combustion is the rapid reaction of a substance with _______ to produce oxides and energy
15. / A ion made up of more than one ion acting as a single particle is a ________ ion
17. / A charged particle that gained or loss one or more electron