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BJU Chemistry Ch 6

Bob Jones Chemistry - Chapter 6

alloy A mixture of a metal's atoms with another element. It has metallic properties.
chemical bond A force of attraction produced by transferring or sharing electrons that holds atoms together in compounds.
covalent bond Two atoms held together by their mutual attraction for the same pair of electrons. It usually involves two nonmetals.
crystal lattice An extensive three-dimensional structure that represents the regular pattern of atoms or ions.
delocalized electron An electron that can move between several different bonds; in benzene, and electron that can move throughout circular spaces above and below the plane of bonded nuclei.
electron-sea theory A theory that offers an explanation of how metals bond: the valence electrons of atoms are said to be freely shared among all atoms; also called the free-electron theory.
electrostatic force The field force exerted by electrical changes. It may be repulsive or attractive depending on the kinds of charges interacting.
formula unit The simplest ratio of elements in an ionic compound that describes its composition.
ionic bond The attraction and electron transfer between two oppositely charged ions in a solid. It usually involves a metal and a nonmetal.
Lewis structure A two-dimensional diagram that uses element symbols and dots to show the bonds between different atoms.
metallic bond A communal sharing of electrons between metal atoms.
network covalent substance Atoms covalently bonded into a continuous three-dimensional network, such as diamond.
octet rule The rule that an atom tends to gain, lose, or share electrons until its outer level s and p orbitals are filled with eight electrons. This activity gives an element the electron configuration and stability of a noble gas.
polarity The tendency of an object to form two localized poles of opposite character. In chemistry, polarity relates to electrical charge.
polyatomic ion A group of atoms that maintains a constant electrical charge while existing as a unit in a wide variety of chemical reactions, such as SO 4 2-.
Created by: heidio



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