METALS AND NONMETALS

Metals are

• dull in appearance

• good conductors of heat

• brittle

• liquids at room temperature

Metals are said to be _________ because they produce typical sounds when struck.

• semiconductors

• brittle

• sonorous

• malleable

The most abundant element in the universe is

• hydrogen

• helium

• oxygen

• carbon

The two most common elements in the earth's crust are

• hydrogen and helium

• hydrogen and carbon

• oxygen and silicon

• oxygen and carbon

The most abundant gas in Earth's atmosphere is

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

The best conductor of heat is

• silver

• copper

• aluminium

• iron

Electric wires are made of

• iron

• copper

• tin

• zinc

What specific property of a metal is illustrated in the picture?

• Hardness

• Ductility

• High melting point

• Malleability

Identify the element that is a semiconductor.

• Iron

• Silicon

• Aluminium

• Tin

Identify the nonmetal in the picture.

• Carbon

• Boron

• Phosphorus

• Sulphur