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compounds and elements

compound pure substance, combinations of elements, the same throughout, broken down to the smallest molecule
element purest substance that cannot be broke down any further, the smallest amount, atoms
pure substance compound or element, one single substance
law of constant proportions no matter the amount, the ratio will stay the same, berthollet and proust
atom smallest amount that maintains its properties
molecule smallest amount of compound that maintains its properties
coefficients indicates how many molecules there are, can change to balance equation, ex. 2HCl
subscript indicates how many molecules there are, cannot change to balance equation, ex. H(little)2
( ) effects whatever is inside, ex. (OH)v2
yields goes to, --->
synthesis when substances come together to make one
decomposition when a substance splits apart to make many
single replacement when one element replaces another in a compound , ex. AB + C ---> AC + B
double displacement when the elements in two compound switch pairings, matching the insides together and the outsides together ex. AB + CD ---> AD + CB
diatomic molecules Clv2,Iv2,Fv2,Brv2,Ov2,Hv2,Nv2 v=subscript
combustion when a fuel reacts with oxygen and yields to water and carbon dioxide, ex. CHv4 + Ov2 ---> Hv2O + COv2
electron negatively charged particle, e-
ion an atom with a charge due to fewer or extra electron
cation positively charged ion
anion negatively charged ion
electrodes give electrons, take electrons
cathode negative electrode, electron supplier, attracts cations
anode positively charged electrode, electron taker, attracts anions
hydronium hydrogen ions
hydroxide OH-
base ph of 7-14, includes OH-
acid ph of 1-7, has only H
photosynthesis opposite of combustion
Created by: nsteiner23



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