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12 Cards in this Set
- Front
- Back
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Density |
d = mass/volume = g/mL = g/cm^3 |
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Pure Substances |
Is a particular kind of matter with a definite, fixed composition.
They are either elements (Cu, Au, O) or compounds (salt, sugar, water).
Can be seperated by chemical means |
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Mixtures |
Is a material containing two or more substances and can be either heterogeneous or homogeneous.
Mixtures are variable in composition.
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Elements |
An element is a fundamental or elementary substance that cannot be broken down by chemical means.
Elements are the building blocks of all substances |
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Atoms |
An atom is the smallest particle of an element that can exist. It is also the smallest unit of an element that can enter into a chemical reaction. |
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7 Diatomic Molecules |
Cl2 I2 Br2 H2 O2 N2 F2 |
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Periodic Table Group Names |
8A - noble gases 7A - halogens 1A - alkali metals 2A - alkaline earth metals B groups - transition metals
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Molecule |
A molecule is the smallest uncharged individual unit of a compound formed by the union of two or more atoms.
IE: water is a typical molecular compound |
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Compounds |
A compound is a distinct substance that contains two or more elements chemically combined in a definite proportion by mass.
Compounds can be decomposed chemically into simpler substances; compounds and or elements. |
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Ion |
An ion is a positively or negatively charged atom(s).
An ionic compound is held together by attractive forces that exist between positively and negatively charged ions.
cation = positive
anion = negative |
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Physical properties |
Physical properties include: *color *taste *odor *state of matter (solid, liquid, gas) *density *melting point *boiling point |
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Chemical Properites |
The ability to form new substances, either by reaction with other substances or by decomposition |
