The table shows some properties of a selection of pure metals. Metal Relative abundance in Earth's crust Cost of extraction Density Strength Melting Point ° C Electrical conductivity relative to iron Iron 2 nd low high high 1535 1 . 0 Titanium 7 th very high low high 1660 0 . 2 Aluminum 1 st high low medium 660 3 . 5 Zinc 19 th low high low 419 1 . 7 Copper 20 th low high medium 1083 6 . 0 Tin 40 th low high low 231 0 . 9 Lead 30 th low very high low 327 0 . 5 Use information from the table to answer the following question: Why is aluminium used for overhead power cables?

Aluminium has a better electrical conductivity to weight ratio as its density is low and relative electrical conductivity relative to iron is high i.e. 3 . 5 . This is why it is used for overhead power cables. It is also used for wiring power grids and in local power distribution lines as well as in the power wiring in some aeroplanes.

The table shows some properties of a selection of pure metals. Metal Relative abundance in Earth's crust Cost of extraction Density Strength Melting Point ° C Electrical conductivity relative to iron Iron 2 nd low high high 1535 1 . 0 Titanium 7 th very high low high 1660 0 . 2 Aluminum 1 st high low medium 660 3 . 5 Zinc 19 th low high low 419 1 . 7 Copper 20 th low high medium 1083 6 . 0 Tin 40 th low high low 231 0 . 9 Lead 30 th low very high low 327 0 . 5 Use information from the table to answer the following question: Why do the aluminium cables have an iron (or steel) core?

The density of aluminium is very low but that of iron (or steel) is very high. Placing iron as the core of aluminium cables, provide strength to it so that it can be drawn upto long distances and increases its durability.

The table shows some properties of a selection of pure metals. Metal Relative abundance in Earth's crust Cost of extraction Density Strength Melting Point ° C Electrical conductivity relative to iron Iron 2 nd low high high 1535 1 . 0 Titanium 7 th very high low high 1660 0 . 2 Aluminium 1 st high low medium 660 3 . 5 Zinc 19 th low high low 419 1 . 7 Copper 20 th low high medium 1083 6 . 0 Tin 40 th low high low 231 0 . 9 Lead 30 th low very high low 327 0 . 5 Use information from the table to answer the following question: Why is copper used instead of aluminium in wiring in the home?

Copper has the lower thermal expansion coefficient with respect to aluminium and has the great tensile strength. It can prevent the frequent breakage and other physical damage. Its electrical conductivity is greater than that of the aluminium. This is why copper is used instead of aluminium in wiring at homes.

The table shows some properties of a selection of pure metals. Metal Relative abundance in Earth's crust Cost of extraction Density Strength Melting Point ° C Electrical conductivity relative to iron Iron 2 nd low high high 1535 1 . 0 Titanium 7 th very high low high 1660 0 . 2 Aluminium 1 st high low medium 660 3 . 5 Zinc 19 th low high low 419 1 . 7 Copper 20 th low high medium 1083 6 . 0 Tin 40 th low high low 231 0 . 9 Lead 30 th low very high low 327 0 . 5 Use information from the table to answer the following question: Why is titanium a good metal to use for jet aircraft and Formula One racing cars?

Due to its low density and high strength titanium is good for jet aircraft and Formula One racing cars as the mass of the metal part won't be affecting the speed of the crafts and the cars maintaining its durability.

EASY

Upper Secondary-IGCSE

IMPORTANT

Earn 100

Write the word equation for the reaction of caesium with water.

Important Questions on Patterns and Properties of Metals

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.1>Q a

Caesium is an alkali metal. It is in Group I of the Periodic table.

State two physical properties of caesium.

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.3>Q f

In the metal displacement reactions, the atoms of the reactive metal lose electrons to become ions. For example:

$Zn (s) \to {Zn}^{2 +} (aq) + 2 e^{-}$

Is this reduction or oxidation?

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.5>Q a

The table shows some properties of a selection of pure metals.

Metal	Relative abundance in Earth's crust	Cost of extraction	Density	Strength	Melting Point $(° C)$	Electrical conductivity relative to iron
Iron	$2^{nd}$	low	high	high	$1535$	$1.0$
Titanium	$7^{th}$	very high	low	high	$1660$	$0.2$
Aluminum	$1^{st}$	high	low	medium	$660$	$3.5$
Zinc	$19^{th}$	low	high	low	$419$	$1.7$
Copper	$20^{th}$	low	high	medium	$1083$	$6.0$
Tin	$40^{th}$	low	high	low	$231$	$0.9$
Lead	$30^{th}$	low	very high	low	$327$	$0.5$

Use information from the table to answer the following question:

Why is aluminium used for overhead power cables?

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.5>Q b

The table shows some properties of a selection of pure metals.

Metal	Relative abundance in Earth's crust	Cost of extraction	Density	Strength	Melting Point $(° C)$	Electrical conductivity relative to iron
Iron	$2^{nd}$	low	high	high	$1535$	$1.0$
Titanium	$7^{th}$	very high	low	high	$1660$	$0.2$
Aluminum	$1^{st}$	high	low	medium	$660$	$3.5$
Zinc	$19^{th}$	low	high	low	$419$	$1.7$
Copper	$20^{th}$	low	high	medium	$1083$	$6.0$
Tin	$40^{th}$	low	high	low	$231$	$0.9$
Lead	$30^{th}$	low	very high	low	$327$	$0.5$

Use information from the table to answer the following question:

Why do the aluminium cables have an iron (or steel) core?

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.5>Q c

The table shows some properties of a selection of pure metals.

Metal	Relative abundance in Earth's crust	Cost of extraction	Density	Strength	Melting Point $(° C)$	Electrical conductivity relative to iron
Iron	$2^{nd}$	low	high	high	$1535$	$1.0$
Titanium	$7^{th}$	very high	low	high	$1660$	$0.2$
Aluminium	$1^{st}$	high	low	medium	$660$	$3.5$
Zinc	$19^{th}$	low	high	low	$419$	$1.7$
Copper	$20^{th}$	low	high	medium	$1083$	$6.0$
Tin	$40^{th}$	low	high	low	$231$	$0.9$
Lead	$30^{th}$	low	very high	low	$327$	$0.5$

Use information from the table to answer the following question:

Why is copper used instead of aluminium in wiring in the home?

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.5>Q d

The table shows some properties of a selection of pure metals.

Metal	Relative abundance in Earth's crust	Cost of extraction	Density	Strength	Melting Point $(° C)$	Electrical conductivity relative to iron
Iron	$2^{nd}$	low	high	high	$1535$	$1.0$
Titanium	$7^{th}$	very high	low	high	$1660$	$0.2$
Aluminium	$1^{st}$	high	low	medium	$660$	$3.5$
Zinc	$19^{th}$	low	high	low	$419$	$1.7$
Copper	$20^{th}$	low	high	medium	$1083$	$6.0$
Tin	$40^{th}$	low	high	low	$231$	$0.9$
Lead	$30^{th}$	low	very high	low	$327$	$0.5$

Use information from the table to answer the following question:

Why is titanium a good metal to use for jet aircraft and Formula One racing cars?

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.5>Q e

Alloys have different properties from the metals they are made from. They are usually harder and stronger with lower melting points.

Solder, which is melted to join together electrical components on circuit boards is a mixture of tin and lead. Suggest why it is used in preference to the pure metals.

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Cambridge IGCSE Chemistry Workbook 4th Edition>Chapter 8 - Patterns and Properties of Metals>Exercise 8.5>Q f

Brass is an alloy of copper and zinc. It is used to make brass musical instruments and to make electrical connectors and plugs. There are two main types of brass: $60 : 40$ and $70 : 30$ copper to zinc. The larger the amount ot zinc, the harder and stronger the alloy is.

Suggest which alloy is used for each of the purposes mentioned above. Give a reason for your answers.

Write the word equation for the reaction of caesium with water.

Important Questions on Patterns and Properties of Metals

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