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25 Cards in this Set
- Front
- Back
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Atom |
Basic units of matter |
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Atomic mass |
Average weighted mass of all isotopes in a naturally occurring sample of that element. |
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Atomic mass unit |
1/12 the mass of carbon-12 and used to express the mass of atomic and subatomic particles. |
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Atomic number |
The number of protons in the nucleus of an atom. Also used to describe the elements place on the periodic table. |
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Calibration curve (lab) |
A graph |
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Concentration (lab) |
Measure of the quality of solute dissolved in a solution at a given temperature.
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Conversion factor |
Comparing U.S. units to metric units. |
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Density (lab) |
Ratio of mass per unit of volume. Does not depend on the amount of substance. (Intensive) |
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Electron |
A negatively charged particle that floats around outside the nucleus of an atom in the electron cloud. |
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Exact number |
When the exact number of the unit being counted is calculated, this is the result. |
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Inexact number |
Numbers whose value have some uncertainty and aren't precise. |
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Ion |
positively or negatively charged particles by gaining or loosing electrons. |
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Isotope |
Contain equal numbers of protons but different numbers of neutrons in the nucleus. |
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Mass (lab) |
Measure of an objects resistance to acceleration |
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Mass number |
Protons + neutrons in the nucleus of the atom |
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Neutron |
Neutrally charged particle located in the nucleus. |
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Nucleus |
Core of atom contain protons and neutrons. |
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Percent error (lab) |
Used to determine the precision of your calculations. |
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Proton |
Positively charged atom located in the nucleus of an atom |
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Scientific notation |
Displaying numbers in terms of a decimal number between 1 and 10 multiplied by 10 to a power. |
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Significant digits |
Presicion based on most imprecise measurement |
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Solution (lab) |
Homogenous mixture comprised of 2 or more substances. |
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Solvent (lab) |
Substance doing the dissolving |
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Subatomic particle |
Particle smaller then an atom |
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Volume (lab) |
The amount of space that a substance or object occupys.
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