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27 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Chemistry |
Study of MATTER and the changes it undergoes. |
No hint. Haha |
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Application of chemistry in health & medicine |
1. Prevention & treatment of diseases 2. Drug discovery 3. Prolonging of life span |
PDP |
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Matter |
Anything that occupies space and has mass |
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What are the categories of matter based on composition and properties? |
1. Substance -Mixture: Homogeneous/ Heterogeneous 2. Element -Compound 3. Atoms and molecules |
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Substance |
Form of matter that has DEFINITE (constant) composition |
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Mixture |
Combination of two or more substances w/c retain their identity Do not have constant composition |
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Homogeneous |
Composition of mixture is SAME throughout 1 phase |
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Heterogeneous |
Composition is NOT UNIFORM 2 or > phases |
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Element |
Cannot be separated into simpler substances by chemical means |
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Compounds |
Composed of atoms of TWO OR MORE ELEMENTS United in fixed proportions |
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Law of definite proportion |
Different samples of the same compound always contain its constituent element in the same proportion by MASS |
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Law of multiple proportion |
two elements combine to form in different rations of small whole numbers to form different compounds |
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What are the states of matter? |
Solid Liquid Gas |
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Solid |
Molecules are held together in an orderly fashion Definitel shape & volume |
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Liquid |
Molecules are close together but are not held so rigidly Assumes shape of container |
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Gas |
Molecules are separated by distances Indefinite shape |
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Gas - Solid |
Deposition |
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Solid - Liquid |
Melting |
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Liquid - Gas |
Evaporation |
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Solid - Gas |
Sublimation Ex. Naphthalene balls Iodine crystals |
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Gas - Liquid |
Condensation |
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Liquid - Solid |
Freezing |
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What are the properties of matter ? |
Extensive Property Intensive Property |
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Extensive Property |
Depends on the AMOUNT of matter Ex. Mass , volume |
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Intensive property |
INdependent of the amount of matter Ex. Density, BP, MP |
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Who are the two persons behind atomic theory? |
Democritus John Dalton |
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What is the theory of Democritus? |
All matter consist of very small, indivisible particles. Concept of atomos |
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