Group 7: The Halogens (AQA GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What colour and state is chlorine at room temperature?
What colour and state is chlorine at room temperature?
Yellow-green gas
What is the physical state of bromine at room temperature?
What is the physical state of bromine at room temperature?
Orange-red liquid
What colour vapour does iodine produce?
What colour vapour does iodine produce?
Purple vapour
What happens to reactivity as you go down Group 7?
What happens to reactivity as you go down Group 7?
Reactivity decreases
What happens to boiling point as you go down Group 7?
What happens to boiling point as you go down Group 7?
Boiling point increases
How many electrons do Group 7 elements have in their outer shell?
How many electrons do Group 7 elements have in their outer shell?
7 electrons
Why does reactivity decrease down Group 7?
Why does reactivity decrease down Group 7?
Outer electrons further from nucleus
What is formed when a metal reacts with a halogen?
What is formed when a metal reacts with a halogen?
A metal halide
How does chlorine's reactivity with iron compare to iodine's?
How does chlorine's reactivity with iron compare to iodine's?
Chlorine reacts much faster
Why is chlorine added to drinking water and swimming pools?
Why is chlorine added to drinking water and swimming pools?
It kills bacteria
What is the key difference between an antiseptic and a disinfectant?
What is the key difference between an antiseptic and a disinfectant?
Antiseptic is safe on skin
Why are fluorides added to toothpaste?
Why are fluorides added to toothpaste?
To reduce dental decay
Why are silver bromide and silver iodide used in photographic film?
Why are silver bromide and silver iodide used in photographic film?
They are sensitive to light