Element
Symbol
Latin Name
Sodium
Na
Natrium
Potassium
K
Kalium
Iron
Fe
Ferrum
Copper
Cu
Cuprum
Silver
Ag
Argentum
Tin
Sn
Stannum
Antimony
Sb
Stibium
Gold
Au
Aurum
Mercury
Hg
Hydrargyrum
Tungsten
W
Wolfram (German)
CHEMICAL FORMULA



Shows the elements and number of atoms per
element present in a given compound
Ex. NaCl contains 1 Na atom and 1 Cl atom
A number written as a subscript indicates the
number of atoms in the element it is immediately
written after.
Ex. H2O = 2 H atoms + 1 O atom
If a parenthesis is used, it changes the amount of
all atoms written inside it.
Ex. Ca(OH)2 = 1 Ca atom + 2 O atoms + 2 H
atoms
COUNT THE NUMBER OF ATOMS
PER ELEMENT PRESENT
 MgCl2
1 Mg 2 Cl
 KMnO4
1 K 1 Mn 4 O
 NH4OH
1N 5H 1O
 Al(OH)3
1 Al 3 O 3 H
 (NH4)2SO4
2N 8H 1S 4O
IMPORTANCE OF NAMING
COMPOUNDS
There are more than 100 elements.
 There are millions of compounds.
 50,000 compounds are being developed
each year!

BINARY IONIC
COMPOUNDS
Composed of two monoatomic ions,
cation (positive metal ion) and anion
(negative non-metal ion).
a. metal has single charge
b. metal has multiple charges
Element
Symbol and
Charge
Stem Name
Name of
Anion
Bromine
Br -
Brom -
Bromide
Carbon
C 4-
Carb -
Carbide
Chlorine
Cl -
Chlor -
Chloride
Fluorine
F-
Fluor -
Fluoride
Iod -
Iodide
Iodine
I
-
Nitrogen
N3-
Nitr -
Nitride
Oxygen
O 2-
Ox -
Oxide
Phosphorus
P 3-
Phosph -
Phosphide
Sulfur
S 2-
Sulf -
sulfide
NAMING IONIC COMPOUNDS

BINARY IONIC COMPOUNDS
a. METAL HAS A SINGLE CHARGE -The
name of the metal is written first followed
by the name of the non-metal. The name of
the non-metal is changed such that it ends
in –ide.
Ex. K2S – potassium sulfide
Mg3P2 – magnesium phosphide
b. METAL HAS MULTIPLE CHARGES –
follows the same rule as metals with single
charge except that the charge is identified
with by a roman number enclosed in a
parenthesis.
Ex. FeO – iron (II) oxide
Fe2O3 – iron (III) oxide
Metal
Oxidation
Number
Stock System
Classical
System
Copper
+1
Copper (I)
Cuprous
+2
Copper (II)
Cupric
+1
Mercury (I)
Mercurous
+2
Mercury (II)
Mercuric
+1
Gold (I)
Aurous
+3
Gold (III)
Auric
Mercury
Gold
Metal
Oxidation Stock System
Number
Cobalt
+2
Cobalt (II)
+3
Cobalt (III)
Manganese
+2
Manganese (II)
+3
Manganese (III)
Iron
+2
Iron (II)
+3
Iron (III)
Chromium
+2
Chromium (II)
+3
Chromium (III)
Classical
System
Cobaltous
Cobaltic
Manganous
Manganic
Ferrous
Ferric
Chromous
Chromic
Metal
Oxidation
Number
Stock System
Classical
System
Tin
+2
Tin (II)
Stannous
+4
Tin (IV)
Stannic
+2
Lead (II)
Plumbous
+4
Lead (IV)
Plumbic
Lead
- Compound composed of two different
non-metallic elements.
STEPS IN NAMING BINARY
MOLECULAR COVALENT
COMPOUND
1. The more electronegative non-metallic
element is written or named last. This is
usually the element present on the right side
of the periodic table.
2. Greek prefixes are used to identify the number
of atoms per element present. If the first
element consists of only one atom, the
numerical prefix mono- is usually omitted.
GREEK NUMERICAL PREFIXES
1
2
3
4
5
monoditritetrapenta-
6
7
8
9
10
hexaheptaoctanonadeca-
3. For the second element, the stem name is
retained and the suffix –ide is added to
the it.
+6 -2
S O
2
6
S O
3
Sulfur trioxide
CO2
Carbon dioxide
CCl4
Carbon tetrachloride
N2O
Dinitrogen monoxide
N2O4
Dinitrogen tetroxide
P2O5
Diphosphorus pentoxide
EXCEPTIONS TO THE RULE
H2O
- water
NH3 - ammonia
PH3
- phosphine
CH4
- methane