Compounds Fall 2015
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1
2C
F
2015
D
. B
♦
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HEMISTRY
ALL
R
RESLYN
Name:
Date:
Chemical Names and Formulas help scientists communicate ideas and data.
Classification and nomenclature (naming) are important parts of all sciences.
Compounds
Know these:
Ionic
Molecular
NaCl = sodium chloride
metal + non-metal
non-metal + non-metal
CaCl
= calcium chloride
very strong bonds
moderately strong bonds
2
solid
solid, liquid, or gas
FeCl
= iron (II) chloride
2
high melting point
low melting point
FeCl
= iron (III) chloride
3
usually dissolves in water
usually does not dissolve in water
CuSO
=copper (II) sulfate
4
For ionic compounds, name by formula unit (lowest whole # ratio of ions).
Sample of NaCl
NaCl Formula Unit
Molecule (NH
)
3
Seven elements exist as
Polyatomic ions are groups of atoms that act like a single unit and carry a charge.
diatomic molecules
H
= hydrogen
2
F
= fluorine
2
O
= oxygen
2
N
= nitrogen
2
Cl
= chlorine
2
Br
= bromine
2
I
= iodine
2-
2-
+
SO
CO
NH
2
ion
ion
ion
4
3
4
Binary Ionic Compounds are made of two elements – a metal and non-metal.
Common Transition
Their overall charge (net ionic charge) must be zero. We must balance the charges.
Metals
Formula
Name:
e.g. CaCl
= calcium chloride
2+
3+
Co -- Co
, Co
2
1+
2+
Cu -- Cu
, Cu
make sure it is a binary ionic compound (metal and nonmetal).
2+
3+
Fe -- Fe
, Fe
check to see if the first element is a transition metal*.
2+
3+
Mn -- Mn
, Mn
the name will be the cation (first element) and anion (element with –ide)
2+
4+
Pb -- Pb
, Pb
2+
4+
Sn -- Sn
, Sn
If a transition metal is present, you must name the cation followed by its charge
using Roman numerals.
2+
Zn -- always Zn
*For example, FeCl
= iron (III) chloride, FeCl
= iron (II) chloride
1+
Ag -- always Ag
3
2
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