A+B-AB
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physical change
A change in a substance that does not involve a change in the identity of the substance
Endothermic
Absorbs heat (cold)
AB-A+B
Decomposition
AB+CD->AD+CB
Double replacement
diatomic molecules
H2, N2, O2, F2, Cl2, Br2, I2
Law of Conservation of Mass
Matter is neither created nor destroyed
________->________
Reactant -> product
Exothermic
Releases heat (hot)
AB+c-AC+B
Single replacement
A+B-AB
Synthisis
chemical change
a change in which one or more substances combine or break apart to form new substances
diatomic molecules (def)
molecules made up of two atoms
types of chemical reactions
synthesis, decomposition, exchange
