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25 Cards in this Set
- Front
- Back
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Ionic Compound
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high melting points, good conductors of electricity
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molecular compounds
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lower melting points tend to be gases, low melting solids. do not conduct electricity
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what are ionic compounds made of?
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an extended array of positively and negatively charged ions
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what are moleular compounds made of?
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molecules
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how is an ionic bond formed?
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transfer of one or more elctrons from one atom or group of atoms to another atom or group of atoms
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how is a covalent bond formed?
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chemical bond formed through the sharing of one or more pairs of electrons between two atoms
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valence electron
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electron in the outermost shell of a representative element or noble gas element
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What is the octete rule?
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while forming compounds atomos of elements gain or lose or share of electrons in a way to produce a noble gas configuration for each of the atoms invovled.
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How does an atom gain a positive charge?
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loss of electrons
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how does an atom gain a negative charge
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gain of a electrons
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when are isoelectronic species
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when an atom and an ion or two ions have the same number and configuration of electrons
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ionic bonds
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one element is a metal and the other a nonmetal
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how do you name binary ionic compounds?
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full name of metallic element followed by the stem of the nonmettalic element and the suffix ide.
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covalent bond
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both elements are similar or identical atoms. most often two non metals
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how does a covalent bond form?
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electron sharign
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what is the basic structural unit of covalent compounds
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molecular compounds
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what states can molecular compounds be at room temp?
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solid, liquids or gases
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what statescan ionic compounds be at room temperature
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solids
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coordinate covalent bond
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covalent bond in which both electrons of a shared pair come from one of the two atoms involved in teh bond
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VSEPR theory
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set of procedures for predicting molecular geometry using information in the lewis structure
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what is the geometry of two electron pairs
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linear 180 degrees apart
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what is the geometry of three electron pairs
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trigonal planar 120 angles. angular : when one of the three electron pairs is nonbonding
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what is the geometry of 4 electron pairs
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tetrahedral 109 egrees
one nonbonding pair trigonal pyramidal two nonbonding pairs angular |
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naming binary molecular compounds
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full name of lower electronegative first, followed by seperate words containg stem of more electronegative and suffix ide. with numerical prefixes giving numbers of atoms before names of the nonmentals
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electronegativity
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measure of the relative attractaion that an atom has for the shared electrons in a bond
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