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18 Cards in this Set
- Front
- Back
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element
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a substance that contains only one kind of atom.
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compound
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substances made up of different kinds of atoms that do not have the same properties as the elements that form them
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chemical formula
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shows the number of atoms of an element in a compound. example:H2O contains two hydrogen atoms and one oxygen atom.
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characteristics
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what elements are classified by, such as whether it is a metal or non-metal.
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metals
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elements that conduct heat and electricity
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malleable
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a characteristic of metal, it means a metal that bends easily.
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non-metals
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elements that do not conduct electricity or heat, they are not shiny or malleable.
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periodic table
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elements arranged on a chart by atomic number.
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why is the periodic table useful
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it arranges the elements with similar properties into columns.
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Do compounds have the same properties as the elements that are combined to form them
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no. compounds do not have the same properties as the elements that form them
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solid
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has a definite shape, the molecules do not move very much, they have very little energy
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liquid
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has a definite shape, takes the shape of the container, molecules have more energy and are close together, but can bounce around and slide over one another
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gas
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has no definite shape. It expands to fill whatever space is available. Molecules have a lot of energy. They move freely.
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melting point
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is the temperature at which a substance changes from a solid to a liquid.
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Boiling point
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the temperature at which liquid changes to a gas
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100 degrees celcius
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boiling point of water
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o degrees celcius/32 farenheit
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melting point of ice
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plasma
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the hot gas containing charged and uncharged atoms and free electrons
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