Chemical Reactions

2. the combination of capital and lowercase letters which represent a chemical element
6. a chemical change & reaction in which electrons are gained, either by the removal of oxygen, the addition of hydrogen, or the addition of electrons
7. a reaction where a carbon compound reacts with oxygen to form carbon dioxide and water
9. symbols which represent a diatomic molecule or a binary compound of 2 or more element
12. the big number in front of a symbol
15. a reaction in which an acid and a base react in an aqueous solution to produce a salt and water
16. equation a chemical equation in which mass is conserved and there are equal numbers of atoms of each element on both sides of the equation
17. a reaction where 2 compounds react to make new cation/anion pairs
18. a chemical reaction in which energy is absorbed
20. a combination of symbols and chemical formulas used to describe what happens in a chemical reaction

1. a reaction that happens when a compound breaks down into simpler substances
3. same number of atoms of each element on both sides of equation
4. occurs when chemical bonds between atoms are formed or broken
5. a chemical reaction that releases energy, usually in the form of heat
8. the small number next to a symbol
10. on the right side of a chemical equation
11. a reaction where 1 element replaces another element that is part of a compound
13. a reaction where 2 substances make a single compound
14. on the left side of a chemical equation
19. name of the arrow shaped symbol in a chemical equation