shorthand for an atom of an element
shorthand for the molecules or basic units of a compound
shorthand for what happens during a chemical change
in a chemical formula tell how many atoms of an element are present in that compund basic unit
in a balanced equations tell how many units of each reactant are needed and how mant units of each product are made
tell the reacting rate
law of conservation of atoms
the atoms present in the reactants are rearranged to form the products. atoms are not lost or gained during a reaction.
put a coefficient in front of the formula
synthesis decomposition single replacement double replacement combustion
5 types of reactions
small to big. A + B = AB
big to small. AB = A + B
A + BC = AC + B... metals have to be paired with a nonmetal
AB + CD = AD + CB. metals have to be paired with a nonmetal
fuel + water = carbondioxide + water
change the amount of chemical energy during a chemical reaction
the bonds if the reactants are broken and the bonds of the products are made
breaking bonds ___ energy. forming new bonds ___ energy.
during a ___ energy is either released or absoarbed from the surrondings
gives off energy
takes in energy
energy that is stored in the structure of a chemical bond
chemical reactions change the time of ___
during a chemical reaction bonds are __ and energy is released
energy is on the product side
energy is on the reactant side
law of conservation
energy is not created or destroyed during chemical changes
is not reaction rate
tell you how fast a reaction is going
is the rate at which the reactants turn into products
temperature surface area stirring increasing and decreasing the concentration of the reactants catalysts
factors affecting reaction rate
increasing heat causes an increase in the average kinetic energy of the reactants. causing more motion. more motion = more collisions
amount of surface exposed, availible for reactions
can be increased by gridding and chopping. the more of this the faster the reaction will happen
increases the exposed area and rate of the reaction concentration
change the way that a reaction happens
are not used up in the reaction, usually speed up the reaction
slows down the reaction
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