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35 Cards in this Set
- Front
- Back
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Chemical Reactions |
Change of one chemical into another |
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Organic Chemicals |
Carbon-containing substances |
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Chemistry |
The study of matter |
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Matter |
Anything physically real |
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Property |
A characteristic useful for identifying a substance |
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Physical Change |
Does not alter the identity of an object |
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Chemical Change |
Alters the identity of a substance |
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Solid |
Has definite shape and volume |
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Liquid |
Has definite volume but no definite shape |
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Gas |
No definite shape or volume |
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Change of State |
A substance changes from one state to another |
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Pure Substance |
Uniform chemical composition throughout |
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Mixture |
Blend of two or more different substances |
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Homogeneous Mixture |
Uniform mixture with the same composition throughout |
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Heterogeneous Mixture |
Nonuniform mixture with regions of different composition |
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Element |
Fundamental substance that cannot be broken down |
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Chemical Compound |
Can be broken down into simpler substances |
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Chemical Formulas |
Use element symbols and subscripts to show how many atoms of each element are present |
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Chemical Reaction |
Identity and composition of one or more substance changes |
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Reactants |
Initial substances (left side) |
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Products |
New substances (right side) |
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Mass |
Amount of mass in an object |
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Weight |
Gravitational force that earth or larger bodies exert on an object |
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Volume |
Amount of space occupied by an object |
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Atom |
The smallest and simplest particle of an element |
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Subatomic particles |
Make up atoms (proton, neutron, electron |
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Protons |
+ charge, 1 amu |
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Neutrons |
Neutral charge, 1 amu |
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Electrons |
- charge, 9.109328×10^-28g |
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Atomic mass unit (amu) |
Unit for describing mass of an atom |
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Nucleus |
Dense, central core of atom, contains protons and neutrons |
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Atomic number (Z) |
Number of protons in the nucleus of an atom of a given element |
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Mass number (A) |
Total number of protons and neutrons in an atom |
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Isotopes |
Atoms with the same atomic number but different mass numbers |
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Atomic weight |
Weighted average mass of an element's atoms |
