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Chemical equations, mixtures, Electron structure, The periodic table…
Chemical equations, mixtures, Electron structure, The periodic table
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Mixtures
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Can be separated out physically, like filtration
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Electron structure
The lowest energy levels are always filled first, these are the ones closest to the nucleus
1st shell: 2, 2ND shells: 8, 3rd shell: 8
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Group 1 elements
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Alkali metals are lithium, sodium, potassium, rubidium, caesium and francium
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Group 7 Elements
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Learn these trends
As you go down group 7
The halogens become less reactive, its harder to gain an extra electron because the outer shell's further from the nucleus
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Form molecular compounds, METAL AND NON METAL
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Group 0 elements
Group 0 elements all inert, colourless gasses
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Include hydrogen, argon and neon
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