When atoms form
chemical bonds by
transferring electrons,
they form ions.
•Atoms that lose electrons become
positively charged ions - more
protons than electrons
•Atoms that gain electrons become
negatively charged ions - fewer
protons than electrons
Reactions
Group 1 elements all react
with non-metal elements to
form ionic compounds, in
which the metal ion has a
single positive charge.
Group 7 elements react with
the alkali metals to form
ionic compounds, in which
the halide ions have a single
negative charge
The reactions between the
elements in groups 1 and 7
are all very exothermic. Some
are explosive in nature, and
they all produce soluble white
solids.
Compounds
An ionic compound is a giant
structure of ions held together
by strong forces of attraction
between oppositely charged
ions. These ions act in all
directions in the lattice, this is
called ionic bonding.
In the formula for any ionic
compound, the sum of the
charges on the ions must be 0.
"An ionic bond is an
omnidirectional electrostatic
force of attraction between
oppositely charged ions"
Covalent Bonding
Metallic Bonding
How structure influences the properties and uses of substances
Atomic Structure, analysis and quantitive chemistry