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A3.2 - Group 7

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

Appearance and state at RTP: Flourine

Back (Answer)

F2 pale yellow gas

#2
Front (Question)

Appearance and state at RTP: chlorine

Back (Answer)

Cl2 pale green gas

#3
Front (Question)

Appearance and state at RTP: bromine

Back (Answer)

Br2 red-brown liquid

#4
Front (Question)

Appearance and state at RTP: iodine

Back (Answer)

I2 grey solid

#5
Front (Question)

Appearance and state at RTP: astatine

Back (Answer)

At2 black solid

#6
Front (Question)

What is the trend in boiling point down group 7?

Back (Answer)

• more electrons • stronger London forces • more energy required to break the intermolecular forces • boiling point increases

#7
Front (Question)

What sub-shells are the electrons in?

Back (Answer)

2 in s sub-shell 5 in p sub-shell

#8
Front (Question)

What is the most common type of reaction of halogens?

Back (Answer)

redox reactions

#9
Front (Question)

What happens to each halogen during redox reactions?

Back (Answer)

each halogen is reduced gaining 1 electron to form 1- halide ion halogen is called oxidising agent

#10
Front (Question)

Where are halogen-halide displacement reactions carried out?

Back (Answer)

carried out on test tube scale

#11
Front (Question)

What does halogen-halide displacement reactions show down group 7?

Back (Answer)

reactivity decreases down the group

#12
Front (Question)

How is halogen-halide displacement reaction carried out?

Back (Answer)

a solution of each halogen is added to aqueous solutions of the other halides –> a reaction takes place, the halogen displacing the halide from solution –> the solution changes colour

#13
Front (Question)

Colour of solution in water: Cl2

Back (Answer)

pale green

#14
Front (Question)

Colour of solution in water: Br2

Back (Answer)

orange

#15
Front (Question)

Colour of solution in water: I2

Back (Answer)

brown

#16
Front (Question)

Halogen-halide displacement reaction: CL- + Br2

Back (Answer)

no reaction

#17
Front (Question)

Halogen-halide displacement reaction: Cl- + I2

Back (Answer)

no reaction

#18
Front (Question)

Halogen-halide displacement reaction: Br- + Cl2

Back (Answer)

orange colour from Br2 formation

#19
Front (Question)

Halogen-halide displacement reaction: Br- + I2

Back (Answer)

no reaction

#20
Front (Question)

Halogen-halide displacement reaction: I1 + Cl2

Back (Answer)

violet colour from I2 formation

#21
Front (Question)

Halogen-halide displacement reaction: I- + Br2

Back (Answer)

violet colour from I2 formation

#22
Front (Question)

Explain the trend in reactivity down group 7.

Back (Answer)

• atomic radius increases • shielding increases • less nuclear attraction • reactivity decreases

#23
Front (Question)

Which halogen is the strongest oxidising agent?

Back (Answer)

flourine

#24
Front (Question)

Define the term disproportionation.

Back (Answer)

redox reaction in which the same element is both oxidised and reduced