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13 Cards in this Set
- Front
- Back
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Matter |
Occupies space Has mass
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Properties |
Characteristics that distinguish one substance from another |
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Physical property |
Not associated with a change in its chemical composition Ex: density, hardness, color, electrical conductivity, melting and boiling Can be observed with or without change in physical state |
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Physical change |
Change in state without change in chemical composition (identity of substance) Ex: salt dissolving in water, wax melting, steam condensing, grinding solids into powders, magnetizing/demagnetizing metals |
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Chemical property |
Change one type of matter into another or inability to change Ex: flammability, acidity, toxicity, reactivity (neon is uncreative) |
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Chemical change |
Produce one or more types of matter that differ from the starting material Ex: rust, food being cooked, digesting or rotting, all forms of combustion (burning) |
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Types of matter |
Pure substances -elements -compounds Mixtures -homogeneous -heterogeneous |
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Pure substances |
Fixed composition Cannot separate by physical process |
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Mixtures |
Variable composition Can separate by physical process |
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Elements |
Any element on the periodic table Cannot separate into simpler substance |
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Compounds |
Fixed composition Can separate by chemical process Ex: NaCl, H2O |
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Homogeneous mixture |
Uniform composition Cannot distinguish visually Ex: salt dissolved in water, brass |
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Heterogeneous mixture |
Non uniform composition Can distinguish visually Ex: pizza, oil and water, cookie |
