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2 Chemical Reaction

Vocabulary for Ch 2 Chemical Reactions

QuestionAnswer
new substance most important sign to look for to know that there is a chemical reaction
4 signs of a chemical reaction change in color, gas is produced, solid is produced, energy is given or taken
endothermic energy is taken in by the chemical reaction
exothermic energy is given off by the chemical reaction
2 steps of a chemical reaction 1) Bonds break 2) New bonds form
subscript small lower number telling how many atoms there are of that element
coefficient large number in the front which tells how many molecules there are
reactants the atoms that are put together to react
products the atoms that come out of a chemical reaction
law of conservation of mass matter is never created or destroyed...it is only changed
4 ways to speed up a chemical reaction increase temperature, add a catalyst, increase concentration, increase surface area
rate of reaction how quickly does the reaction take place
activation energy the energy needed to start a chemical reaction
covalent compounds two non-metals share electrons (H2O)
ionic compounds a metal and a non-metal give/take electrons (NaCl)
Prefixes for 1, 2, 3, and 4 mono, di, tri, tetra
synthesis A + B --> AB
decomposition AB --> A + B
single displacement A + BC --> AC + B
double displacement AB + CD --> AD + CB
Created by: browngdavid