Analyze physical properties of sodium chloride.

Sodium chloride is a substance and it's properties are
it's characteristic qualities.

Sodium chloride could have
different forms:

- fine grains of salt (this is the table
salt);

- salt crystals whose diameters have up to 3
mm;

- crystals of rock salt, whose diameters have 5cm or
more.

No matter the differences between these samples of
salt, they have the same fundamental properties.

The
crystals from each sample are bounded by square or rectangular faces. Each face is
always at right angle to each adjacent
face.

The crystals of salt break along planes
parallel to the original
faces.

The
taste of all samples, no matter the size, is
salty.

Also, the
density of the salt, no matter the size, doesn't
change:2.163 cm^-3.

Also, there are many other physical
properties that can be measured exactly: hardness, malleability, electric and thermal
conductivity, ductility and melting point.