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Chemistry Year 8! Part 1
Game Code: 1773333
English
17
Public
Year 8 IGCSE Chemistry
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Atoms contains protons, neutrons and electrons. Protons are ______ charged.
Positively
5
Atoms contains protons, neutrons and electrons. neutrons are ______ charged.
neutral
5
State the conditions needed for rusting
Oxygen and Water
5
Explain why painting an iron object prevents it from rusting
The layer of paint stops air and water reacting with the iron
5
What pH value is neutral?
pH7
5
In chromatography, name the liquid that the pigments are dissolved in
solvent or alcohol
5
In chromatography, we draw the base-line in pencil because...
ink would dissolve in solvent
5
State 2 physical properties of all metals (10points)
Conduct heat/electricity, ductile, shiny surface
10
What does a cooling curve show?
It shows how the temperature changes as a substance is cooled down.
5
Particles in a gas are arranged....
Far apart
5
When a metal compound reacts with an acid, what is produced? (10 points)
Gas and Salt
10
Potassium Hydroxide reacts with Hydrochloric Acid. Name the salt Produced
Potassium Chloride
5
What is the meaning of the term "isotope"?
Atoms with the same number of protons but different number of neutrons
5
Name this process
distillation
5
Word equation for Water reacting with Sodium
sodium + water => sodium hydroxide + hydrogen
10
When measuring a liquid being heated, we should stir the liquid. Why?
To ensure the temperature is same throughout
5
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