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19 Cards in this Set
- Front
- Back
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What is composed of symbols and subscripts indicating the number of atoms of an element in a compound?
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Chemical formula
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When some elements combine chemically, they no longer have the same _____________ they did before forming a compound.
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properties
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Atoms form compounds when the compound is more __________ than the separate atoms.
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stable
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Noble gases are more ________ __________ than other elements because they have a complete outer energy level.
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chemically stable
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Elements that do not have full outer energy level are more stable in __________.
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compounds
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Atoms can do what 3 things with their electrons to get a stable outer energy level.
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lose, gain or share
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What is the force that holds atoms together in a compound?
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Chemical bond
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Why do elements for compounds?
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To become more chemically stable by getting a complete outer energy level.
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What is a charged particle because it has more or few electrons than protons
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an ion
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An atom becomes positively charged when it _________ an electron.
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loses
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An atom becomes negatively charged when it _________ an electron.
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gains
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An ionic compound is held together by the _________ __________.
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Ionic bond
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The result of an ionic bond is a ________ compound because the sum of the charges on the ions is zero.
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neutral
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What are neutral particles formed as a result of sharing electrons?
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molecules
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What is the force of attraction between atoms sharing electrons?
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covalent bond
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What has one end that is slightly negative and one en that is slightly positive although the overall molecule is neutral?
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A polar molecule
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Electrons are shared equally in a __________ molecule.
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nonpolar
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What forms when atoms lose or gain electrons?
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Ionic bonds
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What forms when atoms share electrons?
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Covalent bonds
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