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35 Cards in this Set
- Front
- Back
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?What is the study of properties of matter and how matter changes
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CHEMISTRY
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What is a subtance that cannot be broken down into any other substances by chemical or physical means
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ELEMENTS
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What is an element made up of?
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tiny particles called atoms
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What is one or two letter set of characters used to identify an element/
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SYMBOL
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A substance made up of two or more elements chemically combined in a specific ratio
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COMPOUND
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What is a combination of symbols that shows the ratio of elements in a compound?
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FORMULA
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WHAT ARE TWO OR MORE SUBSTANCES-ELEMENTS, COMPOUNDS, OR BOTH-that are together in the same place but are NOT chemically combined into a new substance.
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MIXTURE
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What is a physical change in matter?
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changes that alter the form or appearance of material but do not converty the material into a new substance.
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What is a chemical change in matter?
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chemical reaction that changes the matter and produces a new substance.
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What is mass?
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How much matter an object contains
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Will the amount of matter change if the force of gravity on it changes?
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NO
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What is the measure of force of gravity on you called?
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WEIGHT
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What is SI?
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The International system of units or Systems International
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SI is the unit ______?
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kilogram (kg)
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Define volume?
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the amount of space that matter occupies
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What is the formula for Volume?
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length X width X height
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Define Density?
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the measure of how much mass is contained in a given volume
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What is the formula for density?
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Mass/Volume
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Who was one of the earliest scientists that thought matter could be divided into smaller and smaller pieces until it couldn't be divided any further.?
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Democritus
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What did Democritus call the smallest piece of matter?
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atomos, for uncuttable
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Who imagined atoms as tiny spheres that couldn't be broken smaller?
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Dalton
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What did Dalton say about elements?
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the atoms in any element are exactly alike
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What did Dalton say about the atoms in different elements?
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the atoms of DIFFERENT ELEMENTS are DIFFERENT
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Dalton said that atoms of each element have a unique ____.
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MASS
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Dalton said the masses of the elements in a compound are alwys in a ____ _____.
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constant ratio
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Today we know that we can _____ ____ of Atoms?
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capture images
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Did we expect to be able to see pictures of atoms today?
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NO
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When an atom is BONDED with one or more other atoms it is ____?
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a molecule
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What is the force that holds tow atoms together?
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CHEMICAL BOND
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Explain why an atom is a model?
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Atoms actually are mental pictures that explain how matter workds
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What element can be separated from other materials in a mixture because of ITS density?
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GOLD
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What is electrolysis?
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an electric cutting method commonly used to break down a copper compound
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Copper and Electrolysis
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to remove an element from it scompound, it is necessary to cause a chemcial reaction
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What are metal strips used in electrolysis?
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ELECTRODES
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How is iron removed from the iron ore?
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chemical reaction and the blast furnace
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