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Published byAlexina Hudson Modified over 6 years ago
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TOPIC: Ionic Bonding Do Now: Which terms are used to identify pure substances? A. an element and a mixture B. an element and a compound C. a solution and a mixture D. An mixture and a compound
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Ionic: Metal + Nonmetal
Metals: lose valence electrons form cation (+ ion) Nonmetals: gain electrons form anion (- ion) Ionic: cation (+ ion) + anion (- ion)
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IONIC BONDING Involves transfer of electrons
Electrons Lost by Metal = Electrons Gained by Nonmetal Ions are formed (cation +)(anion -)
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Review: Metals are losers!
Na configuration 2-8-1 Ne configuration 2-8 Na loses 1 electron → Na+1 Na+1 configuration is 2-8! (Ne) What will take the valence electron from Na?? Na metal A nonmetal
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Review: Nonmetals are winners!
Cl configuration 2-8-7 Ar configuration 2-8-8 Cl gains 1 electron → Cl-1 Cl-1 has the configuration 2-8-8! (Ar) What will donate an electron to Cl ?? Cl2 (g) A metal
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electron transferred from Na to Cl
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NOTE: the elements have very different physical properties than the compound they form
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Since Ionic Compounds need + ion and – ion to form, they can actually contain more than one nonmetal or even be formed from all nonmetals if they have something called a polyatomic ion Turn to table E in your ref table K2SO4 NH4Cl NH4NO3
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Polyatomic ions -They are NOT neutral, they have a charge (either + or -) - they are covalently bonded (made of nonmetals only) SO NH PO OH-
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