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31 Cards in this Set
- Front
- Back
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atom
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the smallest particle of an element that still has the same chemical properties of the element
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molecule
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a combination of two or more atoms that arebonded together
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malleability
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means that a metal can be bent, flattened, and rolled into thin sheets
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ductility
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can be rolled into thin threads (wires) without breaking
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solid
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matter with a definite shape and volume
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liquid
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definite volume and no definite shape
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gas
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no definite shape or volume
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sublimation
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when matter changes from a solid to a gas (skipping the liquid phase)
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acid
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reacts easily with other substances and turnsblue litmus paper red; corrosive, sour; pH < 7
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base
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reacts easily with other substances, turnsred litmus paper blue; slippery, bitter; pH > 7
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physical properties
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property that can be observed or measured without changing the identity of the substance |
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physical change
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alters a substance's appearance like size, shape, or state without forming a new substance
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chemical properties
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is the way a substance to react with other substances |
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chemical change
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is a change in matter that produces a new substance with different properties from the original
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Buoyancy
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the upward push of a liquid or a gas on an object placed in it
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reactivity
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how easily something reacts with something else |
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hardness
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the ability of the material to scratch another material
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weight
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the measurement of the pull of gravity on an object
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conductivity
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the ability of a material to transfer heat and electricity
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density
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the measurement of how much mass fits within a certain volume
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matter
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anything that has mass and takes up space
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mass
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the amount of matter in an object
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volume
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the amount of space that matter takes up
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neutralization
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the chemical change of an acid and a base into water and a salt
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precipitate
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a solid that sometimes forms when two liquids combine
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chemical bond
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a force that holds atoms together
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chemical reactions
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a process that produces chemical change, resulting in new substances that have properties different from those of the original substances
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chemical equation
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a way to represent a chemical reaction by using symbols for the amounts of reactants and products in the change
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reactant
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an original substance at the beginning of a chemical reaction
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product
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are the substances that form as a result of the reaction
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law of conservation of mass
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states that matter cannot be created or destroyed during a chemical reaction
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