489 prompts matching "How atomic number identifies an element"
Real-life Nigeria: The nitrogen cycle and nitrogen fixation
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Chemistry at work: Nitrogenous fertilisers in Nigerian farming
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Practice set: The preparation and properties of carbon monoxide
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Spot my mistake: Describing carbon monoxide as an acidic oxide
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Real-life Nigeria: Carbonates, hydrogencarbonates and their reactions
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Chemistry at work: Carbon dioxide in the Nigerian bottling and fire-safety trades
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Exam practice: Removing permanent hardness by chemical and ion-exchange methods
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Spot my mistake: Expecting boiling to remove permanent hardness
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Real-life Nigeria: The advantages and disadvantages of hard water
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Chemistry at work: Hardness and the Nigerian water supply industry
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Practice set: Phosphate and potash fertilisers
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Spot my mistake: Assuming more fertiliser always means a better yield
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Real-life Nigeria: The effect of fertiliser overuse on soil and water
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Chemistry at work: Fertiliser production and distribution in Nigeria
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Practice set: The coloured ions of the transition metals
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Exam practice: Transition metals and their compounds as catalysts
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Spot my mistake: Calling zinc a typical transition metal
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Real-life Nigeria: Complex ion formation and the ligands involved
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Chemistry at work: Transition metals in Nigerian industry
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Practice set: Proteins, their structure and the tests for them
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