Vocab

2. Displacement – The positive ion from one compound replaces the positive ion of the other to form a new compound. ( AB + CD → AD + CB ).
4. – thermal energy is absorbed and needed to complete the reaction
5. – these represent the number of units of each substance taking part in a reaction
6. – the new substances produced in a chemical reaction
9. – the gain of an electron
10. reaction – occurs when one substance breaks down into two or more substances ( AB → A + B )
12. chemical equation – a chemical equation with the same number of atoms of each element of both sides of the arrow
16. – the loss of an electron
17. reaction – a reaction that can occur in both the forward and reverse directions
18. – the starting substances on the left hand side of chemical reaction
19. reaction – a change is which one of more substances are converted into a new substance.
20. reaction – two or more substances combine to form another substance ( A + B → AB )

1. reaction – occurs when a substances reacts with oxygen to produce energy in the form of heat and light
3. – a state in which forward and reverse reactions proceed at equal rates
7. rate – the rate at which reactants change into products
8. Displacement – Atom A displaces atom B to produce a new molecule AC ( A + BC → AC + B)
11. equation – a way to describe a chemical reaction using chemical formulas and other symbols
13. – a substance that speeds up a chemical reaction
14. – are used to slow down the rate of chemical reactions or prevent them from happening at all
15. – energy given off in the form of thermal energy or heat.