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8 Cards in this Set
- Front
- Back
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What is the gas produced from group 1 elements when reacted with an alkaline solution?
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hydrogen
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what is oxidisation?
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adding oxygen
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what raw material is nitrogen obtained?
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air
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Before 1800 how were elements classified?
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in order of atomic mass
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What did Mendeleev do?
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left gaps in the periodic table
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what did Newlands do?
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organised the periodic table into atomic mass and octaves
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how can you tell the number of outer electrons are in an element?
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the group number is equal to the amount of electrons
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Describe the trend for group 1 elements
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going down - elements become more reactive and have lower melting and boiling points
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