Exercise 5.3 Metal mixtures [Must Do]

Ductile metals

• Will stretch without being damaged

• Can be drawn or stretched out into long wires

• Will never break

• include examples such as Copper

The experiment is to study the resistance to corrosion of alloys as compared to pure metals. State the constant variables in this experiment. (more than 1 answer)

• Type of nails

• The presence of brown layer on the nail

• Size of nails

• Type of solution

• Duration of experiment

9-caratgold is used for..

• building

• jewellery

• aircraft

• steel

The experiment is to study the resistance to corrosion of alloys as compared to pure metals. Which nail is resistance to corrosion?

• iron nails

• steel nails

Alloys are created to improve the working properties and appearance of metals, they are made by combining two or more elements.

• True

• False

A silver-colored coin is a mixture of

• copper and tin

• copper and nickel

• copper and carbon

• copper and gold

When an object changes shape when struck by a hammer it is said to be...

• luster

• malleable

• brittle

• ductile

A copper-colored coin is an alloy of

• copper, zinc and aluminium

• copper, zinc and tin

• zinc, tin and gold

Alloys are mixture of different metals together and ______ them

What makes steels

• Iron + steels

• Iron + carbon

• Iron + antimony

• Iron + vanadium