chemistry ionic bonds and compounds. section 7 definitions ionic compound ionic bond chemical…
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Forming Ionic Compounds IONIC COMPOUND: Compounds composed of cations and anions Usually metal cation and nonmetal anion Ionic compounds are electrically neutralTRANSCRIPT
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CHEMISTRYIonic Bonds and
Compounds
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Section 7 Definitions Ionic Compound Ionic Bond Chemical Formula Formula Unit
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Forming Ionic Compounds IONIC COMPOUND:
Compounds composed of cations and anions Usually metal cation
and nonmetal anion Ionic compounds are
electrically neutral
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The positive cation attracts the negative anion IONIC BONDS: The electrostatic force that
holds ionic compounds together Na has one v.e. and Cl has 7 v.e.
When they form a compound, Na gives up it’s one v.e. to Cl, forming Na +; Cl gained that v.e., becoming Cl -
Combine in 1:1 ratio Na + Cl = NaCl
Ex.: Li + Br
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The chemical formula of an ionic compound shows the lowest amount of ions needed to make a “balanced or neutral” compound
This is called a FORMULA UNIT The smallest whole-
number ratio of ions in a formula
Ionic compounds are not separate things like molecules but continuous arrays of ions
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Ionic Compound Properties Most are crystalline solids at room temp Crystals have repeating, 3-dimensional patterns When dissolved in water, ionic compounds
break up into cations and anions Water molecules keep them apart
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Typically have high melting points due to strong attractive forces
Ionic compounds conduct electricity when dissolved in water Used as electrolytes
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Assignment
Ionic Compounds Worksheet Name to Formula Ionic Compounds
Worksheet