Download Final Exam Review 2010 UbD

Unit 3 Nomenclature (“The Language of Chemistry”):
1. What is the difference between an element and a compound? An element consists of only one type
of element from the periodic table (ex: Na, Pb, H2). A compound consists of more than one
element (ex: H2O, NaCl, CuSO4)
2. Define “valence electron”. Electrons in the outermost energy level/shell
How do you determine how many valence electrons an atom has? Look at the period (column)
number that the element is in on the periodic table.
3. Complete the table about bonding.
How are their
What elements are
valence electrons
involved?
interacting?
Ionic
Bonding
One metal and one
non-metal
They
steal/transfer
electrons to
become “+” and
“-“ ions. Then
opposites attract.
Naming Rules
The first element is the
element name. The
second element is the
root of the element
name with “ide” at the
end.
(ex: NaCl  sodium
Chloride)
Formula Writing
Rules
1. Determine the
charges on
each element.
2. Criss Cross
3. Reduce
*Transition Metals
need a roman numeral
Covalent
Bonding
Two non-metal
elements
They share
electrons
The first element is the
element name. The
second element is the
root of the element
name with “ide” at the
end. Prefixes are used
to show how many of
each element there
are.
(ex: H2O 
Dihydrogen Monoxide)
*Do not use a the
prefix “mono” if it is
the first element in the
compound
The prefixes tell you
how many of each
element you have.
Do Not Reduce!
4. Complete the table about formula writing:
Ionic or Covalent?
Chemical Name
Chemical Formula
Ionic
Iron (III) chloride
FeCl3
Ionic
Lead (IV) oxide
PbO2
Covalent
Dinitrogen tetraoxide
N2O4
43.Complete the table about naming:
Ionic or Covalent?
Chemical Name
Chemical Formula
Ionic
Lead (II) Nitrate
Pb(NO3)2
Covalent
Diphosphours Pentoxide
P2 O5
Ionic
Calcium Chloride
CaCl2
5. List the number of atoms of each element in the compound: (NH4)3PO4
6. List the number of elements in the compound: (NH4)3PO4
4 elements
20 atoms