Year 9 Halogens and review 2025-2026

Last updated about 4 hours ago

59 questions

Note from the author:

Instructions

Halogens

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Untitled Section 1

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Library

Year 9 Halogens and review 2025-2026

Last updated about 4 hours ago

59 questions

Note from the author:

This is a from to ensure that you do not miss any specification points 1.13-1.20

Instructions

This is a from to ensure that you do not miss any specification points 1.13-1.20

Halogens

1

Untitled Section 1

1

2

Chlorine reacts with hydrogen to form a colourless gas,_______  (HCl(g))that dissolves in water to form an acid called _______ acid(HCl(aq)).

4

Chlorine gas is _______ 
Bromine liquid is _______ 
Iodine solid is dark _______ 
Iodine gas is _______ 

1

Which is the most reactive element in Group 7?
_______ is the most reactive element in group 7

6

Other Answer Choices:

displaces

ionic

more

brown

bromine

iodine

chlorine

orange

5

This question is about the element beryllium
An atom of beryllium has a central ____________that contains particles called protons and _____________ . Around these particles, there are ______________ orbiting in ___________ . An atom of beryllium has no charge because it contains equal numbers of ____________  and______________  . The particles with the lowest mass in an atom of beryllium are called ______________ .

Other Answer Choices:

electrons

protons

nucleus

neutrons

shells

2

Beryllium forms a compound with the formula Be(OH)₂.

(i) How many different elements are there in Be(OH)₂?

_______ (1)

(ii) What is the total number of atoms in the formula Be(OH)₂?

_______ (1)

6

Other Answer Choices:

more

hydroxide

lilac

one

lost

hydrogen

react

weaker

further

same

more

1

3

1

6

1

This is a from to ensure that you do not miss any specification points 1.13-1.20

This is a from to ensure that you do not miss any specification points 1.13-1.20

Halogens

Use the diagrams to answer the questions

Halogens

What is group VII in the periodic table called?

alkali metals

halogens

noble gases

Transition metals

At room temperature Cl₂

is a gas

is a liquid

is a solid

Chlorine reacts with hydrogen to form a colourless gas,_______  (HCl(g))that dissolves in water to form an acid called _______ acid(HCl(aq)).

Chlorine gas is _______ 
Bromine liquid is _______ 
Iodine solid is dark _______ 
Iodine gas is _______ 

At room temperature, the physical state of bromine is:

A: solid

B: liquid

C: gas

Which is the most reactive element in Group 7?
_______ is the most reactive element in group 7

6 mark halogen displacement question

Write this into your book as a model answer.
Order of reactivity: _____________   > ____________  > ___________  
Experiment 
add (aqueous) chlorine to a solution of potassium bromide 
 the solution turns ___________ as bromine is produced 
Conclusion/Explanation and equation: 
(so) chlorine ______________  bromine 

Full equation
Cl₂ + 2KBr → Br₂ + 2KCl 
__________ equation
/ Cl₂ + 2Br⁻ → Br₂ + 2Cl⁻ 
Experiment 
add (aqueous) bromine to a solution of potassium 
iodide 
 the solution turns __________  as iodine is produced 
Conclusion/Explanation and equation: 
(so) bromine is _________  reactive than
 Br₂ + 2KI → I₂ + 2KBr 
or ionic equation
Br₂ + 2I⁻ → I₂ + 2Br⁻
Experiment 
add (aqueous) chlorine to a solution of potassium iodide 
 the solution turns brown 
 iodine is produced 
Conclusion 
(so) chlorine is more reactive than iodine 
Cl₂ + 2KI → I₂ + 2KCl 

Cl₂ + 2I⁻ → I₂ + 2Cl⁻ 

Other Answer Choices:

displaces

ionic

more

brown

bromine

iodine

chlorine

orange

This question is about the element beryllium
An atom of beryllium has a central ____________that contains particles called protons and _____________ . Around these particles, there are ______________ orbiting in ___________ . An atom of beryllium has no charge because it contains equal numbers of ____________  and______________  . The particles with the lowest mass in an atom of beryllium are called ______________ .

Other Answer Choices:

electrons

protons

nucleus

neutrons

shells

Beryllium forms a compound with the formula Be(OH)₂.

(i) How many different elements are there in Be(OH)₂?

_______ (1)

(ii) What is the total number of atoms in the formula Be(OH)₂?

_______ (1)

Sodium and potassium react with cold water to give similar products.
The electronic configuration of sodium is 2.8.1.
The electronic configuration of potassium is 2.8.8.1.
Explain the similarities and differences in the way sodium and potassium react with cold water by considering their reactions and their electronic configurations.
Write this into your book as a model answer
similarities 
• both in the _________  group (alkali metals)
• __________  in a similar way 
• Both have ________electron in their outer shell
• both produce _____________ and fizz (when reacted with 
water) 
• both produce a metal ______________ /alkaline solution (when 
reacted with water) 
differences 
• potassium _________  reactive 
• potassium has a __________  flame 
• potassium outer electron ____________  from nucleus 
• potassium has _________  shells 
• potassium has ___________  attraction of outer electron by nucleus 
• potassium outer electron more easily _________  

Other Answer Choices:

more

hydroxide

lilac

one

lost

hydrogen

react

weaker

further

same

more

What is group I in the periodic table called?

alkali metals

halogens

noble gases

Transition metals

What is group 0 in the periodic table called?

alkali metals

halogens

noble gases

Transition metals

Alkali metals are

relatively soft compared to transition metals

relatively hard compared to transition metals

Alkali metals have

relatively high melting points

relatively low melting points

Which of the following is true of the reactions between alkali metals and water?

Fizzing is observed due to hydrogen gas being formed

Fizzing is observed due to oxygen gas being formed

Fizzing is observed due to carbon dioxide gas being formed

Option 1

Option 2

For the reactions of the group I metals and water the order of reactivity from most reactive to least reactive is

Li K Na

Li Na K

K Na Li

Rubidium would be ____________________

More reactive than lithium

Less reactive than lithium

From Li to K the number of electron shells between the nucleus and the outermost electron

Increases

Decreases

From Li to K the atomic radius

Increases

Decreases

From Li to K the force of attraction between the nucleus and the outermost electron

Increases

Decreases

From Li to K the outermost electron is lost

More easily

Less easily

As the outermost election is lost more easily the reactivity of the Group I metal

increases

decreases

At room temperature Br₂

is a gas

is a liquid

is a solid

At room temperature I₂

is a gas

is a liquid

is a solid

Chlorine gas is

Pale yellow

Green

Red - brown

Dark grey

Bromine is

Pale yellow

Green

Red - brown

Dark grey

Iodine is

Pale yellow

Green

Red - brown

Dark grey

Astatine is likely to be

Pale yellow

Green

Red - brown

Dark grey

As group VII is descended the melting point of the halogens

increases

decreases

What is used to test for chlorine gas

Damp red litmus paper

Damp blue litmus paper

What is the positive result for the chlorine test?

Damp red litmus paper turns blue then white

Damp blue litmus paper turns red then white.

Give the product of the following reaction Iron + chlorine →

Iron chlorine

Iron chloride

Iron chlorate

Give the product of the following reaction magnesium + bromine →

Magnesium bromide

Magnesium bromine

Amagnesium bromate

When the metal halides dissolve in water they form

Acidic solutions

Alkali solutions

Neutral solutions

When the hydrogen halides dissolve in water they form

Acidic solutions

Alkali solutions

Neutral solutions

Option 1

Option 2

Tick all the boxes where a reaction would take place

Option 1

Option 2

As group 7 is descended _______________________

The atomic radius decreases

The atomic radius increases

As group 7 is descended the tendency to gain an electron

increases

decreases

As group 7 is descended the halogens become

More reactive

Less reactive

From Fluorine to iodine the halogens become

More reactive

Less reactive

Periodic table

A

B

C

D

Which two of the following are properties of the alkali metals?

they form coloured compounds

they form hydroxides that are soluble in water

they have lower melting points than most usual metals

they react with water, releasing hydrogen

What did Mendeleev leave in his periodic table?

Gaps for undiscovered elements

I honestly can not think of another answer here

What did Mendeleev make with his periodic table?

Predictions that proved be correct

Predictions that proved to be incorrect

In the modern periodic table the elements are in order of increasing

atomic mass

atomic number

In the periodic table the elements are arranged in order of increasing atomic number, in rows called ________________

Groups

Periods

in the periodic table elements with similar properties are placed in the same vertical columns called ____________

Groups

Periods

Non-metals are found on the _________ hand side of the periodic table

Halogens

Starch

Colourless

Liquid

Solid

What can be used to test for iodine?

What colour (if any) is sodium chloride

What is the state of bromine at room temperature?

What is the state of iodine at room temperature?

Use the diagrams to answer the questions

I₂

Cl₂

Br₂

Dark grey

Gas at room temperature

Liquid at room temperature

Pale green

Red - brown

Solid at room temperature

Halogens

Pale green

Red - brown

Dark grey

Gas

Purple

What colour is chlorine?

What colour is bromine?

What colour is solid iodine ?

What is the state of chlorine at room temperature?

What colour are iodine vapours

What is group VII in the periodic table called?

alkali metals

halogens

noble gases

Transition metals

At room temperature Cl₂

is a gas

is a liquid

is a solid

At room temperature, the physical state of bromine is:

A: solid

B: liquid

C: gas

6 mark halogen displacement question

Write this into your book as a model answer.
Order of reactivity: _____________   > ____________  > ___________  
Experiment 
add (aqueous) chlorine to a solution of potassium bromide 
 the solution turns ___________ as bromine is produced 
Conclusion/Explanation and equation: 
(so) chlorine ______________  bromine 

Full equation
Cl₂ + 2KBr → Br₂ + 2KCl 
__________ equation
/ Cl₂ + 2Br⁻ → Br₂ + 2Cl⁻ 
Experiment 
add (aqueous) bromine to a solution of potassium 
iodide 
 the solution turns __________  as iodine is produced 
Conclusion/Explanation and equation: 
(so) bromine is _________  reactive than
 Br₂ + 2KI → I₂ + 2KBr 
or ionic equation
Br₂ + 2I⁻ → I₂ + 2Br⁻
Experiment 
add (aqueous) chlorine to a solution of potassium iodide 
 the solution turns brown 
 iodine is produced 
Conclusion 
(so) chlorine is more reactive than iodine 
Cl₂ + 2KI → I₂ + 2KCl 

Cl₂ + 2I⁻ → I₂ + 2Cl⁻ 

Sodium and potassium react with cold water to give similar products.
The electronic configuration of sodium is 2.8.1.
The electronic configuration of potassium is 2.8.8.1.
Explain the similarities and differences in the way sodium and potassium react with cold water by considering their reactions and their electronic configurations.
Write this into your book as a model answer
similarities 
• both in the _________  group (alkali metals)
• __________  in a similar way 
• Both have ________electron in their outer shell
• both produce _____________ and fizz (when reacted with 
water) 
• both produce a metal ______________ /alkaline solution (when 
reacted with water) 
differences 
• potassium _________  reactive 
• potassium has a __________  flame 
• potassium outer electron ____________  from nucleus 
• potassium has _________  shells 
• potassium has ___________  attraction of outer electron by nucleus 
• potassium outer electron more easily _________  

What is group I in the periodic table called?

alkali metals

halogens

noble gases

Transition metals

What is group 0 in the periodic table called?

alkali metals

halogens

noble gases

Transition metals

Alkali metals are

relatively soft compared to transition metals

relatively hard compared to transition metals

Alkali metals have

relatively high melting points

relatively low melting points

Which of the following is true of the reactions between alkali metals and water?

Fizzing is observed due to hydrogen gas being formed

Fizzing is observed due to oxygen gas being formed

Fizzing is observed due to carbon dioxide gas being formed

Option 1

Option 2

For the reactions of the group I metals and water the order of reactivity from most reactive to least reactive is

Li K Na

Li Na K

K Na Li

Rubidium would be ____________________

More reactive than lithium

Less reactive than lithium

From Li to K the number of electron shells between the nucleus and the outermost electron

Increases

Decreases

From Li to K the atomic radius

Increases

Decreases

From Li to K the force of attraction between the nucleus and the outermost electron

Increases

Decreases

From Li to K the outermost electron is lost

More easily

Less easily

As the outermost election is lost more easily the reactivity of the Group I metal

increases

decreases

At room temperature Br₂

is a gas

is a liquid

is a solid

At room temperature I₂

is a gas

is a liquid

is a solid

Chlorine gas is

Pale yellow

Green

Red - brown

Dark grey

Bromine is

Pale yellow

Green

Red - brown

Dark grey

Iodine is

Pale yellow

Green

Red - brown

Dark grey

Astatine is likely to be

Pale yellow

Green

Red - brown

Dark grey

As group VII is descended the melting point of the halogens

increases

decreases

What is used to test for chlorine gas

Damp red litmus paper

Damp blue litmus paper

What is the positive result for the chlorine test?

Damp red litmus paper turns blue then white

Damp blue litmus paper turns red then white.

Give the product of the following reaction
Iron + chlorine →

Iron chlorine

Iron chloride

Iron chlorate

Give the product of the following reaction
magnesium + bromine →

Magnesium bromide

Magnesium bromine

Amagnesium bromate

When the metal halides dissolve in water they form

Acidic solutions

Alkali solutions

Neutral solutions

When the hydrogen halides dissolve in water they form

Acidic solutions

Alkali solutions

Neutral solutions

Option 1

Option 2

Tick all the boxes where a reaction would take place

Sodium chloride

Sodium bromide

Sodium iodide

Chlorine water

Bromine water

Iodine water

Option 1

Option 2

As group 7 is descended _______________________

The atomic radius decreases

The atomic radius increases

As group 7 is descended the tendency to gain an electron

increases

decreases

As group 7 is descended the halogens become

More reactive

Less reactive

From Fluorine to iodine the halogens become

More reactive

Less reactive

Periodic table

A

B

C

D

Which two of the following are properties of the alkali metals?

they form coloured compounds

they form hydroxides that are soluble in water

they have lower melting points than most usual metals

they react with water, releasing hydrogen

What did Mendeleev leave in his periodic table?

Gaps for undiscovered elements

I honestly can not think of another answer here

What did Mendeleev make with his periodic table?

Predictions that proved be correct

Predictions that proved to be incorrect

In the modern periodic table the elements are in order of increasing

atomic mass

atomic number

In the periodic table the elements are arranged in order of increasing atomic number, in rows called ________________

Groups

Periods

in the periodic table  elements with similar properties are placed in the same vertical columns called ____________

Groups

Periods

Non-metals are found on the _________ hand side of the periodic table

Left

Right

The number of occupied shells is equal to the

period

group

The number electrons in the outer shell of an element is equal to the

period

group

Match the number to the description for the halogens is water or petroleum ether (organic layer)

Focus simulation halogens

Br₂ organic layer

Br₂ water layer

Cl₂ organic layer

Cl₂ water layer

I₂ organic layer

I₂ water layer

1

2

3

4

5

6

Which letter shows iodine in cyclohexane?

A

B

C

D

E

F

Use the results of the displacement reactions to place the halogens in order of reactivity from most reactive to least reactive.

Note 1. the halide ions would have to be added as a salt such as KCl, KBr and KI rather than the individual ions

Note 2. The potassium halide solutions are all colourless.

Note 3. The final colour of the sample depends upon the halogen present only.

Most reactive

Least reactive

Chlorine

Bromine

Iodine

	Starch	Colourless	Liquid	Solid
What can be used to test for iodine?
What colour (if any) is sodium chloride
What is the state of bromine at room temperature?
What is the state of iodine at room temperature?

	I₂	Cl₂	Br₂
Dark grey
Gas at room temperature
Liquid at room temperature
Pale green
Red - brown
Solid at room temperature

	Pale green	Red - brown	Dark grey	Gas	Purple
What colour is chlorine?
What colour is bromine?
What colour is solid iodine ?
What is the state of chlorine at room temperature?
What colour are iodine vapours