CHEMISTRY 2

smelting is the process coal heated to burn off oils and leave carbon

• True

• False

An alloy that is a mixture of iron carbon and traces of other metals

• coke

• ore

• steel

• slag

Pig iron is used to make smelting or refined further to make steel

• True

• False

When a metal react with the oxygen to form a compound is called

• corrosion

• oxide

• corrode

• iron

The method of protecting steel by coating it with zinc is called

• blast furnace

• galvanizing

• corroding

• rust

When ships and rigs are protected by attaching a block of zinc or magnesium to them is called

• corrosion

• sacrificial metal

• layer of rust

• steel

Zircon is a yellow stone that can be polished into a jewel

• True

• False

Zirconium oxide is used to make artificial joints, such as knees and hips

• True

• False

Zirconium was discovered in

• 1682

• 1787

• 1797

• 1887

Iridium was discovered in

• 1602

• 1788

• 1803

• 1888