Materials - Metals/non-metals

Question 1

What is the elements near the steps on the periodic table called?

Answer 1

Semiconductors or metalloids

Question 2

Name the six properties of metal

Answer 2

1. An element that tends to form positive ions
2. Shiny - lustrous
3. Can be stretched to make wire - ductile
4. Can be beaten into various shapes - malleable
5. Are good conductors of heating and electricity.
6. Are strong.

Question 3

Name four properties of nonmetals

Answer 3

1. An element that tends to form negative ions.
2. Are not good conductors of heat.
3. Are not good conductors of electricity.
4. Tend to be brittle.

Question 4

Alloy

Answer 4

A mixture of metals

Question 5

Give two examples of alloy

Answer 5

Brass = copper + zinc
Bronze = copper + tin

Question 6

Rusting

Answer 6

A chemical reaction in which iron is changed into a new substance

Question 7

What is the chemical name for rust?

Answer 7

Iron oxide

Question 8

Name three ways rusting can be prevented

Answer 8

1. Painting/polish.
2. Oiling or greasing
3. Galvanising.