Y8 Chemistry PPE Revision Flashcards
Give 6 properties of metals:
Heat Conductor, Electrical Conductor, Ductile, Solid, Opaque, Posses Metallic luster.
Give 6 properties of non-metals
Dull, Brittle, Poor thermal conductors, poor electricity conductors, gains electrons easier
What is an Ore?
A natural occurring solid material from which a metal or valuable can be extracted.
How are metals at the top of the reactivity series extracted from their ores?
by electrolytic reduction
How are metals in the middle of the reactivity series extracted from their ore?
Heating the ore with Carbon
What are the Metals in order of their reactivity?
Potassium, sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Tin, Lead, Copper, Silver, Gold, platinum
Give an example of a physical change
Crushing a can
What are 3 signs that a chemical reaction has occurred
Bubbles, Change in temperature, Change in colour.
What is the difference between a endothermic reaction and a exothermic reaction.
Endothermic reaction occurs when energy is observed from surroundings in the form of heat and a Exothermic reaction is when energy is released
What is an oxidation reaction? Give an example:
The addition of oxygen to a substance. Rusting
What is a thermal decomposition reaction?
Chemical combination caused by heat.
Give an example of thermal decomposition
Calcium Carbonate = calcium oxide + Carbon Dioxide.
What is Combustion?
Rapid chemical combination of a substance with oxygen, involving heat and light.
Give an example of Combustion.
Burning wood.
Explain what happens in a displacement reaction.
A more reactive element displaces a less reactive element from its compound.
Give an example of a displacement reaction.
Reaction of Iron Nails with Copper Sulphate Solution.
