Metals and Alloys

Question 1

Name at least 4, 6 in the answers

What are the physical properties of a metal?

Answer 1

Strong, Conduct Electricity, Malleable, Ductile, Shiny and most are Solid

Question 2

What does malleable mean?

Answer 2

Can be beaten into shape

Question 3

What does ductile mean?

Answer 3

Can be pulled into wires

Question 4

What is an alloy? Give an example

Answer 4

A mixture of two or more elements one of which a metal, being melted together. Bronze is Copper and Tin

Question 5

What does finite mean and how can we save metals?

Answer 5

Will eventually run out and recycling

Question 6

Name a battery advantage and disadvantage

Answer 6

A- portable, save
D-expensive, replace, dispose

Question 7

Names a mains advantage and disadvantage

Answer 7

A-doesn’t run out, cheap
D- dangerous, not portable and uses up fossil fuels

Question 8

Metal + Oxygen =>

Answer 8

Metal Oxide

Question 9

Metal + Water =>

Answer 9

Metal hydroxide + hydrogen
e.g. magnesium + dilute hydrochloric acid => Magnesium Chloride + Hydrogen

Question 10

What is the purpose of an electrolyte?

Answer 10

Complete the circuit and allows ions to flow

Question 11

Where is iron extracted from its ore?

Answer 11

A blast furnace

Question 12

What type of metals are found uncombined in the Earth’s crust give examples?

Answer 12

Unreactive metals e.g. gold, silver and platinum

Question 13

What is meant by an ore? Give an example

Answer 13

A substance containing a high % of a metal ion
e.g. bauxite contains aluminium ions

Question 14

Name these metals in order of reactivity: Cu, Pb, Al, Mg, Zn, Fe

Answer 14

Cu, Pb, Fe, Zn, Al, Mg

Question 15

What do you have to heat copper with to extract it from its ore?

Answer 15

Carbon

Question 16

What do you have to do to extract a reactive metal from its ore?

Answer 16

Use electricity

Question 17

What is another way of saying iron corroding?

Answer 17

Rusting

Question 18

What does Ferroxyl indicator change to if Fe2+ ions are present?

Answer 18

yellow to blue

Question 19

What is the test to see if iron is corroding without looking at the colour?

Answer 19

Ferroxyl indicator yellow to blue

Question 20

Benefits to recycling metals…

Answer 20

Cheaper than extracting it’s metal from ore.
Saves energy.
Less landfill sights.

Question 21

What is meant by a reactive metal?

Answer 21

It reacts easily with other substances

Question 22

What is meant by an unreactive metal?

Answer 22

Does not react with other substances

Question 23

Why is silver oxide less stable than magnesium oxide?

Answer 23

Silver is lower in the reactivity series than magnesium

Question 24

How does a battery work?

Answer 24

Converts chemical energy into electrical energy

Question 25

What kind of rechargeable battery is used in a car?

Answer 25

Lead acid battery

Question 26

What element in a dry cell supplies the electrons?

Answer 26

Zinc

Question 27

What element in a dry cell accepts the electrons?

Answer 27

Carbon

Question 28

What corrodes easily? What doesn’t?

Answer 28

Zinc, Aluminium (More reactive corrodes easily). Gold, Silver

Question 29

Name three ways that you can protect a metal from corrosion/ rusting

Answer 29

Paint, Galvanising (zinc), Electroplating

Question 30

Name thee experiment to see how reactive a metal is

Answer 30

-Burn it (e.g. Potassium burns with a lilac flame when heated and Magnesium reacts readily in air burning with a white light.)
-Put in water (e.g. Potassium reacts violently with water.)
-Dilute Acids (e.g. Magnesium reacts facts and gas is produced quickly)

Question 31

What metal is used for galvanising

Answer 31

Zinc