@Covalent bonds are NOT present in which one of the following substances?
Copper
Diamond
Sulphur

@Aqueous copper II sulphate conducts electricity because it contains:
Ions
Copper
Molecules

@Which one of the following is the most likely melting point of an ionic solid?
950C
0C
-57C

@An element that forms crystals composed of small molecules is:
Iodine
Diamond
Magnesium

@The melting and boiling points of a substance which is volatile at room temperature (20C) could be:
-7C and 58C
-38C and 357C
29C and 690C

@A chemical change occurs when
Iron rusts
Ice melts
Salt dissolves

@Which statement about covalent bonds is true
They are as strong as ionic bonds
They are present in some metals
They are the weakest type of bonds found

@Which one of the following does not contain ionic bonds?
N
NaCl
AlCl

@In a crystal atoms are arranged:
In a regular pattern
According to the shape of the container they were made in
In single long chains

@How do scientists find out how atoms are arranged in crystals?
By using beams of X-rays
By measuring the melting point
By electrolysis of the molten crystal
