Non - metals

What is the chemical composition BRONZE ???

• 80% of zinc , 10% of copper and 10% of silver

• 80% of copper , 10% of tin and 10% zinc

• 50 % of gold , 30 % of silver and 20 % of brass

Air contains how much % of oxygen

One exception of a non - metal

• Bromine

• Gold

• Mercury

• Graphite

COPPER metal is used in

• Making electric wires

• Filling tooth cavities

• Making fuse wires

Graphite is used for making stainless steel

• True

• False

• Cannot be determined

Is chlorine soluble in water ???

• Yes

• No

• Fairly

One example of a noble gas