2. Atoms/ groups of atoms with an electrical
charge
Positive Ions
Loses
electrons
Negative Ions
Gains
electrons
MEMORIZE the names and charges
of common ions – p 19
4. Metal and Non-metal:
Metal + Non-metal + “-ide”
Non-metal and Non-metal:
• Name first non-metal, then
second non-metal and add “–ide”
• Use prefixes for ratio’s of
elements
Elements to the left of periodic table
are named FIRST!!!
5. Name cation first, then anion
If the cation is a transition metal:
• Ion has more than one possible
charge
• Use Stock-notation to indicate
charge (Roman numerals after
name)
6. Name the following compounds:
a) CaBr2
b) N2S5
c) V2O5 (V5+)
d) ZnSO4
e) (NH4)3PO4
f) Na3P
8. Group I = +1
Group II = +2
Group III = +3
Group IV = + 4
Group V = -3
Group VI = -2
Group VII = -1
Group VIII = Do Not
form BONDS!!!
10. Substances combine in such a way that the
compound is neutral
• Sum of charges = 0
Choose ion with largest charge
• Assume there are only one atom of that
ion in the compound
Set number of atoms of other ion = x
• Solve for x
Remove fractions to obtain whole numbers
11. Write chemical formulae for compounds of the
following substances:
a) Sodium and oxygen
b) Potassium sulphide
c) Iron(II)chloride
d) Magnesium carbonate
e) Calcium Nitrate
f) Aluminium oxide
g) Ammonium sulphate