Term
| The shape of an ionic crystal depends on ______. |
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Definition
| the arrangement of ions in its lattice. |
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Term
| Two factors that determine the arragenment of ions in an ionic crystal. |
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Definition
| 1. the ratio of ions 2.the relative sizes of the ions. |
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Term
| true or false: The attractions among ions within a crystal lattice are weak. |
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Definition
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Definition
| a molecule is a neutral group of atoms that are joined together by one or more covalent bonds. |
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Term
| true or false: in a molecule of a compound, electrons are always shared equally by both atoms. |
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Definition
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Term
| in general, elements at the ____ of a group have a greater attraction for electrons than elements at the ____ of a group have. |
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Definition
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Term
In a hydrogen chloride molecule, the shared electrons spend more time near the ______ atom than near the
____ atom. |
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Definition
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Term
| describe a polar covalent bond |
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Definition
| a polar covalent bond is a covalent bond in which electrons are not shared equally. |
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Term
| when atoms form a polar covalent bond, the aotm with the greater attraction for electrons has a partial _____ charge |
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Definition
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Term
| in the formula of a molecular compound, the number of atoms of an element on the molecule is represented by a(n) _______ |
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Definition
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Term
| true or false: the law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction |
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Definition
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Term
| chemists use a couting unit called ____ to measure amounts of a substance becuase chemical reactions often involve large numbers of small particles. |
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Definition
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Term
| one mole of oxygen has a mass of 32 grmas. what is the mass of four moles of oxygen? |
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Definition
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Term
| name five general types of chemical reactions |
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Definition
| synthesis, decomposition, single replacement, double replacement, and combustion. |
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Term
| true or false: a decomposition reaction is the opposite of a synthesis reaction. |
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Definition
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Term
| copper reacts with silver nitrate in a single-replacement reaction. what are the products of this reaction? |
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Definition
| copper(II) nitrate and silver |
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Term
| what is a double-replacement reaction? |
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Definition
| a dourble-replacement reaction is a reaction in which two different compounds exchange positive ions and form two new compounds. |
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Term
| true or flae: the reaction that forms water can be classified as either a synthesis reaction or a combustion reaction. |
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Definition
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Term
| true or flae: the reaction that forms water can be classified as either a synthesis reaction or a combustion reaction. |
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Definition
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Term
| the process in which an elemnt gains electrons during a chemical reaction is called _________ |
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Definition
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