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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 of an atom and that are involved in chemical bonding
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electron dot diagram |
a representation of the valence electrons in an atom, using dots
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chemical bond |
the force of attraction that holds two atoms together
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ion |
an atom or group of atoms that has become electrically charged
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polyatomic ion |
an ion that is made of more than one atom
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ionic bond |
the attraction between oppositely charged ions
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ionic compound |
a compound that consists of positive and negative ions
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chemical formula |
symbols that show the elements in a compound and the ratio of atoms
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subscript |
a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
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crystal |
a solid in which the atoms are arranged in a pattern that repeats again and again
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covalent bond |
a chemical bond formed when two atoms share electrons
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molecule |
a group of atoms bonded together that can take part in a chemical reaction
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moleculer compound |
a compound that is composed of compounds
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double bond |
a chemical bond formed when atoms share two pairs of electrons
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triple bond |
a chemical bond formed when atoms share three pairs of electrons
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nonpolar bond |
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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chemical equation |
a short, easy way to show a chemical reaction, using symbols
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product |
a substance formed as a result of a chemical reaction
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law of conservation of mass |
the principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
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open system |
a system in which matter can enter 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 |
a number in 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 |
a chemical reaction in which two or more simple substances combine to form a new, more complex substance
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decomposition |
a chemical reaction that breaks down compounds into simpler compunds
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replacement |
a reaction in which one element replaces another in a compound or when two elements in different compounds trade places
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