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22 Cards in this Set
- Front
- Back
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What is chemistry?
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The study of the composition, properties and changes that matter undergoes,
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What is matter?
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anything that has mass and occupies space.
Example: book, air, water etc |
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What are the 3 states of matter?
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Solid,liqud and gas
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What is a property?
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a characteristic that is used to distinguish between different forms of matter
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Descripe the characteristics of a liquid
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No definite shape, takes the shape of the container. It has a definite volume
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Descripe the characteristics of a solid
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has a definite shape and feinite volume.
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Descripe the characteristics of a gas
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no definite shape or voume
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what is a chemical property?
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a characteristic that is observed when matter undergoes change or resists changes. Ex: rusting of a nail, gold resisting rust.
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what is a physical property?
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a characteristic that is used to observed without matter undergoing changes.Example: color,smell,taste,temp, density etc
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What kind of changes does matter undergo?
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Physical change and chemical change
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what is a chemical change?
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a change in which new substances are formed and the basic composition is changed. ex: burning of paper (paper to ashes)
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what is a physical change?
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a change in which no new substances are formed. Basic composition is the same. Changes the physical apperance. ex: liquid to solid (freezing of water) (stretching a rubber band)
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What is a substance?
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Single form of matter with unique properties and uniform throughout
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what is a mixture?
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a combination of 2 or more substances. Each substance retains its own property and composition may vary.
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What is an element?
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Its a single substance that cannot be simplified by any means. Cant break it down. Its natural occuring or man made. Solid, liquid or gas.
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what is a compound?
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two or more elements combined with one another that can be seperated by chemical needs only. ex H2O (hydrogen and oxygen)
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How are elements distinguished?
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by their names and symbols. Symbols of element is 1 or 2 letters of the English or derived name of the element.
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What are the first 20 elements on the Periodic table and there symbols?
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Hydrogen-H
Helium-He Lithium-Li Berylium-be Boron-B Carbon-C Nitrogen-N Oxygen-O Flourine-F Neon- N Sodium-NA Potassium-K Iron- Fe Copper-Cu Gold-Au Silver-Ag Mercury-Hg |
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what do you call two compounds put together?
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a mixture
ex: salt water, sugar |
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What are two different types of mixtures
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Heterogeneous, homogeneous
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what is a geterogeneous mixture?
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a mixture with distinct phases (we can tell by looking) The differences between the substances. Ex: chicken noodle soup
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what is a homogeneous mixture?
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no distinct phases, looks the same, uniform throughout. ex: sugar dissolved in water. (cant see with your eyes)
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