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27 Cards in this Set
- Front
- Back
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valence electron |
the electrons that are in the highest energy level and are involved in chemical bonding |
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electron dot diagram |
a representation of the valence electrons in an atom
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chemical bond |
the force of attraction that holds two atoms together |
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ion
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an atom or group of atoms that becomes electrically charged
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polyatomic ion
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an ion that is made of more than one atom
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ionic bond |
the attraction between oppositley charged ions
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ionic compound |
a compound that consists of positive and negative ions
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chemical formula
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symbols that show the elements in a compound and the ratio of atoms
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subscript |
a number in the chemical formula that tells the number of atoms in a molecule in the ratio of elements in a compound
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crystal
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a solid in which the atoms are arranged in a pattern that repeats again and agian
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covalent bond |
a chemical bond formed when two atoms share electrons |
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molecule
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a neutral group of two or more atoms held together by covalent bonds |
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molecular compound |
a compound that is composed of molecules |
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double bond
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a chemical bond formed when two atoms share two pairs of electrons
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triple bond |
a shemical bond formed when atoms share three pairs of electrons
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nonpolar bond
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a covalent bond in which electrons are shared equally
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polar bond |
a covalent bond in which electrons are shared unequally
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reactant |
a substance that enters into a chemical reaction |
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product
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a substance formed as a result of a chemical reaction |
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chemical equation |
a short, easy way to show a chemical reaction using symbols
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law of conservation of mass
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the principle that the total amount of matter is neither created nor destroyed any chemical or physical change
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open system |
a system in which matter can from or escape to the surroundings |
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closed system |
a system in which no matter is allowed to enter or leave |
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coefficient
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a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
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synthesis
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a chemical reaction in which two or more simple substances combine to form a new, more complex substance
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decomposition
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a chemical reaction that breaks down compoundas into simpler compounds |
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replacement |
a reaction in which one element replaces another in a compound or when two elements in different compounds take place |
