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25 Cards in this Set
- Front
- Back
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Democritus |
matter is composed of tine, indivisible things called atoms (correct) |
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aristotle |
all matter is made of four elements; earth, fire, wind and air (incorrect) |
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compound |
two or more elements chemically combined in certain proportions |
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solution |
mixture that is heterogeneous on a microscopic level |
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solvent |
what is doing the dissolving |
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solute |
substance that is dissolved |
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two big aspects of chemistry |
matter and energy |
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fundamental particle of matter |
atom |
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centi |
hundredth |
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milli |
thousandth |
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kilo |
thousand |
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micro |
millionth |
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nano |
billionth |
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JJ Thomson |
plum pudding model; proton positively charged |
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Rutherford |
positively charged nucleus |
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James Chadwick |
discovered neutrons |
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isotopes |
atoms of the same element with different masses |
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electromagnetic force |
opposites attract |
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Covalent |
atoms share electrons Non-polar – shared evenly Polar – shared unevenly |
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ionic |
bonded by electrostatic forces |
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Hydrogen |
a hydrogen is covalently bonded to a more electrostatic atom and attracted to another electrostatic atom |
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Metallic bond |
loosely held valence electrons move freely through the metal. |
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Van der Waals forces |
the attraction that all atoms have for other atoms |
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electronegativity |
describes how strongly an atom attracts electrons from another atom. |
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isomer |
molecules that can be represented by the same formula but the atoms are arranged in different ways |
