L5 | MATTER | Properties of materials

Question 1

What are some examples of metals?

Answer 1

copper (Cu)
zinc (Zn)
gold (Au)
Silver (Ag)
tin (Sn)
lead (Pb)

Question 2

What is the symbol of Copper?

Answer 2

Cu

Question 3

What the symbol of zinc?

Answer 3

Zn

Question 4

Symbol of gold?

Answer 4

Au

Question 5

Symbol of silver?

Answer 5

Ag

Question 6

Symbol of Tin?

Answer 6

Sn

Question 7

Symbol of lead?

Answer 7

Pb

Question 8

Thermal conductors?

Answer 8

Metals are good conductors of heat and are therefore used in cooking utensils such as pots and pans.

Question 9

Electrical conductors?

Answer 9

Metals are good conductors of electricity, and are therefore used in electrical con- ducting wires.

Question 10

Shiny metallic luster?

Answer 10

Metals have a characteristic shiny appearance and are often used to make jewelry.

Question 11

Malleable and ductile?

Answer 11

This means that they can be bent into shape without breaking (malleable) and can be stretched into thin wires (ductile) such as copper.

Question 12

Melting point?

Answer 12

Metals usually have a high melting point and can therefore be used to make cooking pots and other equipment that needs to become very hot, without being damaged.

Question 13

Density?

Answer 13

Metals have a high density.

Question 14

Magnetic properties?

Answer 14

Only three main metals (iron, cobalt and nickel) are magnetic, the others are non- magnetic.

Question 15

What is one of the most distinguishing characteristics of Metalloids?

Answer 15

Their conductivity increases as their temperature increases.

Question 16

What is semi- conductance?

Answer 16

Substances that can conduct electricity under some conditions, but not others, making it a good medium for the control of electrical current.

Question 17

Magnetism

Answer 17

force that certain kinds of objects, which are called ‘magnetic’ objects, can exert on each other without physically touching. A magnetic object is surrounded by a magnetic ‘field’ that gets weaker as one moves further away from the object.

Question 18

What elements do non-metals include?

Answer 18

Sulphur (S), phosphorus (P), nitrogen (N) and oxygen.

Question 19

What is ferromagnetic?

Answer 19

A metal is said to be ferromagnetic if it can be magnetised (i.e. made into a magnet).