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Oxides

In this worksheet, students will learn about properties of metal and non-metal oxides with respect to acidity.

'Oxides' worksheet

Key stage:  KS 3

Curriculum topic:  Chemistry: Materials

Curriculum subtopic:  Metals from Metal Oxides and Carbon

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Oxides are chemicals which contain oxygen joined to atoms of other elements. The most common oxide is water; it is chemically called hydrogen oxide, as one oxygen atom is joined with two hydrogen atoms. The image shows a model of a water molecule.

Carbon forms two different oxides. Carbon dioxide contains two oxygen atoms (di- means two), whereas carbon monoxide (mono- means one) contains one oxygen atom. Carbon dioxide is a gas in the atmosphere used by plants for photosynthesis; it is also produced by animals and plants during respiration. Carbon monoxide is a deadly gas. 

Oxides are formed by many elements, metals and non-metals. Aluminium is a metal that does not corrode, because it naturally forms a coating of aluminium oxide, as it reacts with oxygen in the air around it. Oxygen in the air is responsible for rusting of iron when it reacts with iron. Water is needed for rusting, too. 

Metal oxides are solid at room temperature. They are also bases; this means they form alkaline solutions when they dissolve in water. Non-metal oxides are usually gases at room temperature. When they dissolve in water they form acidic solutions.

This pattern of behaviour can be explained if we look at the Periodic Table (click on the image to see a larger version).

 

 

The metals on the Periodic Table are generally to the left and as we move to the right we start coming across non-metals. As we move from left to right along each period (row) on the Periodic Table, the oxides of the elements become progressively more acidic.

Non-metal oxides, such as sulphur dioxide and nitrogen oxide, dissolve in water in clouds and form acid rain.

What is the main element in oxides?

oxygen

metal

acid

What is the most common oxide?

carbon monoxide

sulphur dioxide

hydrogen oxide

What is the common name for hydrogen oxide?

acid

sulphur

water

How many oxygen atoms does carbon dioxide contain?

1

2

3

Is this statement true or false?

Carbon monoxide is a very dangerous gas that is produced in boilers when they do not work properly.

true

false

Is this statement true or false?

Oxides are formed only by non-metals.

true

false

Are metal oxides solids, liquids or gases at room temperature?

solids

liquids

gases

What do non-metal oxides form when they dissolve in water?

alkaline solutions

acidic solutions

Complete this sentence.

As we move from _______________ along each period (row) on the Periodic Table, the oxides of the elements become progressively more acidic.

left to right

right to left

What type of rain is formed when sulphur dioxide and nitrogen oxide dissolve in water in clouds?

  • Question 1

What is the main element in oxides?

CORRECT ANSWER
oxygen
EDDIE SAYS
Oxides are compounds of oxygen with other elements.
  • Question 2

What is the most common oxide?

CORRECT ANSWER
hydrogen oxide
EDDIE SAYS
The most common oxide is hydrogen oxide.
  • Question 3

What is the common name for hydrogen oxide?

CORRECT ANSWER
water
EDDIE SAYS
The common name for hydrogen oxide is water.
  • Question 4

How many oxygen atoms does carbon dioxide contain?

CORRECT ANSWER
2
EDDIE SAYS
Carbon dioxide contains two oxygen atoms.
  • Question 5

Is this statement true or false?

Carbon monoxide is a very dangerous gas that is produced in boilers when they do not work properly.

CORRECT ANSWER
true
EDDIE SAYS
The statement is true; carbon monoxide is a deadly gas.
  • Question 6

Is this statement true or false?

Oxides are formed only by non-metals.

CORRECT ANSWER
false
EDDIE SAYS
The statement is false; both metals and non-metals form oxides.
  • Question 7

Are metal oxides solids, liquids or gases at room temperature?

CORRECT ANSWER
solids
EDDIE SAYS
Metal oxides are solids at room temperature.
  • Question 8

What do non-metal oxides form when they dissolve in water?

CORRECT ANSWER
acidic solutions
EDDIE SAYS
Non-metal oxides form acidic solutions when they dissolve in water.
  • Question 9

Complete this sentence.

As we move from _______________ along each period (row) on the Periodic Table, the oxides of the elements become progressively more acidic.

CORRECT ANSWER
left to right
EDDIE SAYS
As we move from left to right along each period (row) on the Periodic Table, the oxides of the elements become progressively more acidic.
  • Question 10

What type of rain is formed when sulphur dioxide and nitrogen oxide dissolve in water in clouds?

CORRECT ANSWER
acid rain
acid
EDDIE SAYS
Acid rain forms when sulphur dioxide and nitrogen oxide dissolve in water in clouds.
---- OR ----

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