CHEM Lecture 4/19/12 Naming Ionic Compounds with Polyatomic Ions – Flashcards
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What are the 4 steps in naming Ionic Compounds with Polyatomic Ions?
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1. Identify the cation and polyatomic ion (anion) 2. Name the cation using a roman numeral if needed 3. Name the polyatomic ion usually ending with ite or ate 4. Write the name of the compound, cation 1st and polyatomic ion 2nd
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Name CaSO4
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Calcium Solphate
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Name Cu(NO2)2
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Copper (II) Nitrite
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Name Ca3(PO4)2
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Calcium Phosphate
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An electrolyte is a solution of an _____ compound in water.
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ionic
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Electrolytes conduct _____ because of dissociated (unbound) ions in the solution.
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electricity
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Covalent compounds are, _____ or _____ pairs of electrons that _____ two atoms to obtain octects.
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one, two, share
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Name the term when no gain or loss of electrons (as in an ionic bond), so no ions formed.
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Covalent Compound
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Covalent compounds form true molecules (unlike ionic compounds) and are called molecular compounds. TRUE or FALSE.
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TRUE
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What are the 3 steps in naming covalent compounds?
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1. Name the first nonmetal by its element name. 2. Name the second nonmetal by changing the last part of its elements name to -ide. 3. Add prefixes to indicate the number of atoms (subscript)
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Prefix for 1
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MONO
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Prefix for 2
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DI
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Prefix for 3
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TRI
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Prefix for 4
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TETRA
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Prefix for 5
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PENTA
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Prefix for 6
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HEXA
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Prefix for 7
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HEPTA
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Prefix for 8
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OCTA
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Prefix for 9
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NONA
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Prefix for 10
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DECA
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Name the covalent bond CO
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Carbon Monoxide
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Name the covalent bond CO2
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Carbon Dioxide
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Name the covalent bond NCl3
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Nitrogen Trichloride
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Name the covalent bond SiBr4
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Silicon Tetrabromide
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Name the covalent bond Br2O
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Dibromine Monoxide
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What are the 2 steps in writing formulas of covalent compounds?
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1. Write the symbol in the order of the elements in the name. 2. Write any prefixes as subscripts.
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Write the formula of the covalent compound Diboron Trioxide.
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B2O3
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Write the formula of the covalent compound Iodine Pentaflouride.
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IF5
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What is electronegativity?
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attraction of an atom for valence electrons in a chemical bond
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What is polarity in covalent bonds?
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electrons not always shared equally in covalent bonds (because of electronegativity differences) resulting in polarity
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Polarity in covalent bonds: equal sharing of e- (little or no difference in electronegativity) results in a nonpolar covalent bond. TRUE or FALSE.
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TRUE
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N-N
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Nonpolar
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O-H
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Polar
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Cl-As
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Polar
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O-K
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Ionic
