500 prompts matching "Assigning an oxidation number without checking the overall charge"
Exam practice: The electron configuration of the first twenty elements
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Calculation practice: Calculating relative atomic mass from isotopic abundance
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Real-life Nigeria: Isotopes in Nigerian medicine and agriculture
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Chemistry at work: How models of the atom developed over time
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Quiz me: Valency, and how it is worked out from configuration
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Explain back: Ions, and how an atom becomes one
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Practice set: Writing the electron configuration of a given ion
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Spot my mistake: Filling electron shells in the wrong order
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Real-life Nigeria: Why the noble gases are unreactive
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Project task: Building a model of an atom
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Teach me: The assumptions of the kinetic theory
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Quiz me: How the kinetic theory explains the three states
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Quiz me: The symbols of the common elements
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Exam practice: Writing and balancing a chemical equation
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Spot my mistake: Changing a formula instead of a coefficient when balancing
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Calculation practice: Working out the formula mass of a compound
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Real-life Nigeria: Chemical formulae on Nigerian product labels
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Chemistry at work: Why chemists use one shared symbolic language
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Teach me: The law of conservation of mass
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Spot my mistake: Applying the law of multiple proportions to the wrong pair
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