Chemistry - Thermite Reaction

What causes Metals to rust?
The metals being exposed to air and water
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How do you prevent rust?
Make a bariier by painting the surface, covering with grease/oil, cover with plastic or tin plating
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What is the chemical symbol for Sodium, Calcium, Potassium and Silver?
Sodium - Na Calcium - Ca Potassium - K Silver - Ag
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What are reactions that give off heat called?
Exothermic
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What does reduce mean?
Loses oxygen
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What does oxidized?
Gains oxygen
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What is the name of Group 1 on the Periodic Table?
The Alkali Metals
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What elements are in Group 1?
Lithium, Sodium, Potassium, Rubidium. Caesium, Francium
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What 3 elements are extremely reactive?
Lithium, Potassium and Sodium
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Why do Alkali Metals need to stored in oil?
To prevent from reacting with oxygen
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Do Alkali Metals have high density or low density?
Low desnsity
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Are alkali metals hard or soft?
Soft
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When an alkali metal is cut it is shiny then turns dull. Why is that?
Because it is reacting with oxygen
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Group 1 metals do what at low temperatures?
Melt/Boil
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What is Thermite made of?
Powdered Aluminium and iron oxide
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What gas is produced when reacting with Alkali metals?
Hydrogen
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During the Thermite reaction the aluminium takes the oxygen from iron. Why?
Because Aluminium is more reactive than Iron
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What do Group 1 metals react with besides oxygen and water?
Halogens (Group 7 elements)
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What is the Thermite Reaction used for?
To weld Train Tracks Together.
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Other cards in this set

Card 2

Front

How do you prevent rust?

Back

Make a bariier by painting the surface, covering with grease/oil, cover with plastic or tin plating

Card 3

Front

What is the chemical symbol for Sodium, Calcium, Potassium and Silver?

Back

Preview of the front of card 3

Card 4

Front

What are reactions that give off heat called?

Back

Preview of the front of card 4

Card 5

Front

What does reduce mean?

Back

Preview of the front of card 5
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