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Cards In This Set
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State the relation ship between atoms and elements. Are both atoms and elements matter?
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Both of them are matter.
elements are made up of atoms. atoms are the smallest part of a element, therefore, it has its properties. both take up space, so yes.
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List the two types of pure substances?
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Elements and compounds
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Describe matter, and explain why light is not matter. is light made of atoms and elements?
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Matter is anything that takes up space.
light is not matter b/c it has no mass or volume.
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Define molecule, and give examples of a molecule formed on element and a molecule formed by teo elements.
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The smallest unit of a substance that keeps all the physical and chemical properties of that balance.
water has 2 elements
hydrogen has 1 element
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Compare and contrast mixtures and pure substances. give an example of each.
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Mixtures are mixtures of many pure substances & a pure substance is one pure sibstance that can not be broken appart.
pure- water and table salt
mixture- grape juice and air.
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State the chemical formula of water.
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H2O
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Classify the following as either chemial or physical properties.
A. is shiny & silvery B. melts easily
C. has density of 2.3 g D. tarnishes in moist air
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A. physical
B. physical
C. physical
D. chemical
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Identify which of the following properties properties are not chemical properties.
A. reacts w/ water. B. boils at 100 C
C. is red D. doesn't reaxt w/ hydrogen
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A. chemical
B. chemical
C. physical
D. chemical
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Describe characteristics properties, and explains why they are important. list some characteristic properties.
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Physical and chemical properties are most useful in dentifying a substance, such as, density, solubility, and reactivity with acids
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Explain why changes of state are physical changes.
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Composition of substance does not change ina chage of state.
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Describe how you would seperate the components of a mixture, and state weather your methods would be physical or chemical changes
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Can be seperated by chemical changes.
by evaporating, melting, and denstilation.
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Define physical change and chemical change and give examples of each.
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Example of physical- ponding, breaking, melting
example of chemical- baking, roating, oxidation
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Explain why physical change can easily be reserved but chemical change can not.
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B/c physical change the identity of substance so they can easily be undone. chemical change forms new substance they can not be reserved by using physical means.
melting and freezing
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Identify two ways to break down a compund into simple substances.
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Heating and electrlesis
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List three clues that indicate a chemical change.
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Color
light
sound
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