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21 Cards in this Set
- Front
- Back
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basic submicroscopic particles that constitute the fundamental building blocks of ordinary matter |
Atoms
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substances formed when two or more atoms come together in a specific geometric arrangement |
molecule |
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subatomic particles; protons neutrons electrons |
elements |
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3 states of matter |
solid liquid gas |
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molecules are packed together tightly but are free to move freely |
liquid matter |
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substance that cannot be chemically broken down into simpler substances |
element |
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substance composed of two or more elements in a fixed definite proportion |
compound |
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mixture made of multiple substances whose presence can be seen |
heterogenous mixture |
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mixture made of multiple substances but appears to be one substance |
homogeneous mixture |
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"in a chemical reaction, matter is neither created nor destroyed" |
Law of conservation of mass |
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"all samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements |
Law of definite proportions |
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When two elements form two different compounds (carbon monoxide and cardon dioxide) can be expressed as a ratio of a small whole number |
law of multiple proportions |
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discovery of the electron with the cathode rays |
J.J. Thompson |
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Determining the charge of the electron |
Milikans Oil Drop Experiment |
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Structure of the atom with gold foil model |
Rutherford |
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With which device can you measure the mass of atoms and molecules |
Mass spectrometry |
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how close the measured value is to the actual value |
accuracy |
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how close to a series of measurements are to one another or how reproducible they are |
precision |
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physical property does not depend on amount of substance but something like heat |
intensive |
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physical properties are dependent on amount |
extensive |
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the action of a froce through a distance |
work |
