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| conducts electricity, forms ions in solution |
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| does NOT conduct electricity, does NOT form ions in solution |
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| smallest representative particle of any element |
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| chemical combination of two or more atoms |
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| Law of Constant Composition |
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| the elemental composition of a pure compound is ALWAYS the same |
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| variable compositions, can be heterogeneous or homogeneous |
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| T or F: Matter changes composition in a physical change |
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False
Matter does not change composition in a physical change
Matter changes composition in a chemical change |
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| SMALLER THAN ATOMS that make up an atom |
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| Thompson's cathode ray led to discovery of... |
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| number of protons in the nucleus of an atom |
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| number of protons PLUS neutrons in an atom |
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| Same element BUT differ in mass number (number of neutrons) |
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| average atomic mass (found through relative abundances and masses of isotopes) |
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| lie along the line that separates metals from non-metals |
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| positive of negative charged particles caused from the lose or gain of electrons from an atom |
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| electrically neutral, containing both cations and anions, usually contain both metallic and non-metallic elements |
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| contain only carbon and hydrogen |
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hydrocarbon where every carbon is attached to 4 other atoms
names end in -ane |
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An H in a hydrocarbon is replaced with an OH
names end in -ol |
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| SAME molecular formula, DIFFERENT bonding structure |
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| A hydrocarbon (or related compound) react with an excess of O2 to form H20 and CO2 |
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| Avogadro's number * 1 molecule |
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| 1 molecule of H20 is 18amu.. how many grams is in 1 mole? |
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| Given the empirical formula, what must you also be given to find molecular formula? |
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electrolytes that are present in a solution ENTIRELY as electrolytes
one way arrow |
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electrolytes that are PARTLY ions and PARTLY molecules
half arrows |
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| Are most compounds electrolytes or non-electrolytes? |
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cations and anions change partners.. i.e. Precipitation reactions
AX+BY-->AY+BX |
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| proton donors, increase concentration of H+ in aqueous solution |
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| proton acceptors, increase concentration of OH- in aqueous solution |
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| Bases that are present in a solution entirely as ions |
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| Acids that are present in a solution entirely as ions |
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| Acids that are present in a solution partly as ions and partly as molecules |
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| Bases that are present in a solution partly as ions and partly as molecules |
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Between an acid and a metal hydroxide
Produces water and a salt. |
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