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chapter 7 Chemistry

Anion an ion that has a negative
Cation an ion that has a positive charge
chemical bond the force that holds two atoms together; may form by the attraction of a positive ion for a negative ion or by sharing electrons
crystal lattice a three-dimensional geometric arrangement of particles in which each positive ion is surrounded by negative ions and each negative ion is surrounded by positive ions; vary in shape due to sizes and relative numbers of the ions bonded
electrolyte an ionic compound whose aqueous solution conducts an electric current
ionic bond the electrostatic force that holds oppositely charged particles together in an ionic compound
ionic compound compounds that contain ionic bonds
Lattice energy the energy required to separate on mole of the ions of an ionic compound, which is directly related to the size of the ions bonded and is also affected by the charge of the ions
formula unit the simplest ratio of ions represented in an ionic compound
monatomic ion an ion formed from only one atom
oxidation number the positive or negative charge of a monatomic ion
oxyanion a polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms
polyatomic ion an ion made up of two or more atoms bonded together that acts as a single unit with a net charge
Alloy a mixture of elements that has metallic properties; most commonly forms when the elements are either similar in size (substitutional alloy) or the atoms of one element are much smaller than the atoms of the other (interstitial alloy)
delocalized electron the electrons involved in metallic bonding that are free to move easily from one atom to the next throughout the metal and are not attached to a particular atom
electron sea model proposes that all metal atoms in a metallic solid contribute their valence electrons to form a "sea" of electrons, and can explain properties of metallic solids such as malleability, conduction, and ductility
metallic bond the attraction of a metallic cation for delocalized electrons
Created by: Patti_lover20



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