CHEM Lecture 4/19/12 Naming Ionic Compounds with Polyatomic Ions

Flashcard maker : Lily Taylor
What are the 4 steps in naming Ionic Compounds with Polyatomic Ions?
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
Name CaSO4
Calcium Solphate
Name Cu(NO2)2
Copper (II) Nitrite
Name Ca3(PO4)2
Calcium Phosphate
An electrolyte is a solution of an _____ compound in water.
ionic
Electrolytes conduct _____ because of dissociated (unbound) ions in the solution.
electricity
Covalent compounds are, _____ or _____ pairs of electrons that _____ two atoms to obtain octects.
one, two, share
Name the term when no gain or loss of electrons (as in an ionic bond), so no ions formed.
Covalent Compound
Covalent compounds form true molecules (unlike ionic compounds) and are called molecular compounds. TRUE or FALSE.
TRUE
What are the 3 steps in naming covalent compounds?
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)
Prefix for 1
MONO
Prefix for 2
DI
Prefix for 3
TRI
Prefix for 4
TETRA
Prefix for 5
PENTA
Prefix for 6
HEXA
Prefix for 7
HEPTA
Prefix for 8
OCTA
Prefix for 9
NONA
Prefix for 10
DECA
Name the covalent bond CO
Carbon Monoxide
Name the covalent bond CO2
Carbon Dioxide
Name the covalent bond NCl3
Nitrogen Trichloride
Name the covalent bond SiBr4
Silicon Tetrabromide
Name the covalent bond Br2O
Dibromine Monoxide
What are the 2 steps in writing formulas of covalent compounds?
1. Write the symbol in the order of the elements in the name.
2. Write any prefixes as subscripts.
Write the formula of the covalent compound Diboron Trioxide.
B2O3
Write the formula of the covalent compound Iodine Pentaflouride.
IF5
What is electronegativity?
attraction of an atom for valence electrons in a chemical bond
What is polarity in covalent bonds?
electrons not always shared equally in covalent bonds (because of electronegativity differences) resulting in polarity
Polarity in covalent bonds: equal sharing of e- (little or no difference in electronegativity) results in a nonpolar covalent bond. TRUE or FALSE.
TRUE
N-N
Nonpolar
O-H
Polar
Cl-As
Polar
O-K
Ionic

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