Test 7

3. substance present at the start of a chemical reaction
8. combination, decomposition, single replacement, double replacement, combustion
9. a solid that forms and settles out from a chemical reaction in an aqueous solution
13. H O N F Cl Br I
14. + or - number assigned to an atom to indicate its degree of oxidation or reduction
16. process that involves the loss of electrons and an increase in the oxidation number
17. a substance resulting from a chemical reaction
18. substance that slows down or prevents a chemical reaction
19. → ↔ ↑ ↓ Δ (s) (l) (g) (cr) (aq)

1. process in which bonds in reactants break and form new bonds in the products
2. increasing surface area usually increases rate
4. a substance that speeds up a reaction without being used up in the reaction
5. chemical reaction showing only the particles directly involved in chemical change
6. increasing T usually increases rate
7. equation showing either oxidation or reduction from a redox reaction
10. process that involves the gain of electrons and a decrease in the oxidation number
11. increasing concentration usually increases rate
12. speed at which a reaction takes place
15. a list of elements in order of decreasing reactivity