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2.3 Group 7

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

Card preview (24)

#1
Front (Question)

Trend in atomic radius down group 7

Back (Answer)

Increases - Main shells and shielding increases - Weaker nuclear attraction to the outer electrons

#2
Front (Question)

Why is the radius of halide ions greater than halogen atoms?

Back (Answer)

• Ions have more electrons • Same number of protons • Weaker nuclear attraction in ions

#3
Front (Question)

Trend in boiling point down group 7

Back (Answer)

Increases (halogens become less volatile) - Larger molecules, more electrons - Stronger van der Waals forces - More energy needed

#4
Front (Question)

Trend in electronegativity down group 7

Back (Answer)

Decreases - More main shells and shielding - Less attraction between shared pair and nucleus

#5
Front (Question)

Trend in first ionisation energy down group 7

Back (Answer)

Decreases - More main shells and shielding - Less nuclear attraction to outer electron - Less energy needed to remove it

#6
Front (Question)

Colour of chlorine

Back (Answer)

Green

#7
Front (Question)

Colour of bromine

Back (Answer)

Red-brown

#8
Front (Question)

Colour of Iodine

Back (Answer)

Black

#9
Front (Question)

State of chlorine (at room temperature)

Back (Answer)

Gas

#10
Front (Question)

State of bromine (at room temperature)

Back (Answer)

Liquid

#11
Front (Question)

Colour of chlorine in aqueous solution

Back (Answer)

Pale green

#12
Front (Question)

Colour of bromine in aqueous solution

Back (Answer)

Orange

#13
Front (Question)

Colour of iodine in aqueous solution

Back (Answer)

Brown

#14
Front (Question)

Colour of chlorine in cyclohexane

Back (Answer)

Pale green

#15
Front (Question)

Colour of bromine in cyclohexane

Back (Answer)

Orange

#16
Front (Question)

Colour of iodine in cyclohexane

Back (Answer)

Pink-purple

#17
Front (Question)

What are the best solvents for halogens?

Back (Answer)

Non-polar solvents like cyclohexane

#18
Front (Question)

Trend in solubility down group 7

Back (Answer)

Solubility decreases

#19
Front (Question)

Are halogens oxidising agents or reducing agents?

Back (Answer)

Oxidising agents (they accept electrons to form halide ions)

#20
Front (Question)

Trend in oxidising power down group 7

Back (Answer)

Decreases - More main shells and shielding - Less nuclear attraction to electron being accepted - Less ability to gain electrons

#21
Front (Question)

Disproportionation

Back (Answer)

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

#22
Front (Question)

What is formed when chlorine reacts with water?

Back (Answer)

HCl + HClO (HClO decomposes in sunlight to form HCl and O₂)

#23
Front (Question)

HClO

Back (Answer)

Chloric (I) acid

#24
Front (Question)

Colour change with litmus paper/universal indicator: HClO

Back (Answer)

Indicator is bleached