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Cambridge IGCSE Chemistry (0620)
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Chem_level 2_states Of Matter_particle Model And Diffusion
G
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Question
How are particles arranged in a solid?
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Answer
Closely packed in fixed positions, vibrating about them.
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1
How are particles arranged in a solid?
2
What happens during melting?
3
What is diffusion?
4
Why does diffusion speed up at higher temperature?
5
What is absolute zero?
6
In the bromine/air diffusion demonstration, why does the colour spread upwards even though bromine is denser than air?
7
A crystal of potassium manganate(VII) is dropped into still water. What happens, and what does it show?