Which among following is a transuranium element?
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This SSC CGL Chemistry question asks: “Which among following is a transuranium element?” The correct answer is Plutonium. Plutonium (Z=94) is a transuranium element as it has atomic number greater than uranium (Z=92). Examination distractors commonly use an outdated name, reverse oxidation and reduction, confuse an element with its compound, or insert a numerically plausible value with the wrong unit. Option A (“Uranium”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Option B (“Thorium”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question.