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27 Cards in this Set
- Front
- Back
Chemical Bond
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A force that holds two or more atoms together.
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molecule
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A group of atoms held together by one type of chemical bond.
( A molecule is made up of two or more atoms.) |
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chemical symbol
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Is one or two letters that stand for the name of an element.
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formula
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is a group of symbols that shows how many atoms of each element are in a molecule of a compound.
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Two or more elements combined chemically to form a new substance.
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Compound
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Have properties of both metals and nonmetals.
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semimetals
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Number of protons in one atom of an element.
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atomic number
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Something made of only one kind of matter.
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substance
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One or two letters that stand for the name of an element.
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chemical symbol
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Elements that have no shine, cannot be shaped and are poor conductors of heat and electricity.
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nonmetals
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Substance that cannot be broken down by simple means into any other substance.
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Element
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Trait that can be observed and measured without changing the identity of a material.
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Physical property
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Group of symbols that shows how many atoms of each element are in a molecule of a compound.
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formula
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Anything that has mass and takes up space.
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matter
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Two or more atoms held together by one type of chemical bond.
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molecule
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Way to describe how something looks or acts or a way to think about something.
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model
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Gases that do not react readily with other elements.
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noble gases
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Describes how one substance reacts with another substance.
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Chemical property
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Elements that are shiny, have high densities, and are good conductors of heat and electricity.
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metals
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Matter that contains two or more substances that do not change their identities.
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mixture
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A force that holds two atoms together
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chemical bond
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Name two ways matter can be classified.
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1. Substance
2. Mixture |
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What are building blocks of matter?
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Elements
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What are the largest group of elements?
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metals
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What gases used to be called inert gases?
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noble gases
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Three examples of physical properties
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Luster
density mass |
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How can elements be classified?
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Elements can be clasified as physical or chemical properties.
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