500 prompts matching "What hardness is, and what causes it"
Exam practice: Isotopy, with examples of isotopes
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Real-life Nigeria: Radioactive isotopes and their uses in Nigeria
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Spot my mistake: Giving an ion the same configuration as its parent atom
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Spot my mistake: Writing a formula without balancing the charges
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Real-life Nigeria: The elements Nigeria mines, and where they sit in the table
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Spot my mistake: Confusing a bond within a molecule with a force between molecules
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Practice set: The pressure law and its graph
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Quiz me: The general gas equation and the terms in it
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Practice set: Molar volume and its value at s.t.p.
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Spot my mistake: Using the wrong value of R for the units given
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Real-life Nigeria: Graham's law of diffusion and the uses made of it
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Exam practice: Solubility and the factors that affect it
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Spot my mistake: Confusing a solution with a suspension
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Real-life Nigeria: The water cycle and its importance
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Exam practice: Where hard water helps, and where it hinders
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Real-life Nigeria: Water pollution and its sources in Nigeria
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Practice set: Measuring pH with paper and with a meter
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Practice set: The structure of graphite and the properties it gives
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Exam practice: The uses of diamond and of graphite
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Spot my mistake: Explaining graphite's conductivity by the wrong structure
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