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Q9: The metal potassium crystallizes in a
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Q39: For a dilute solution of NH<sub>4</sub>NO<sub>3</sub>,the van't
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Q54: A device emits light at 761.7
Q63: Gold (atomic mass 197.0 g/mol),with an atomic
Q64: Which element is found in the p-block
Q73: In which ionic compound,NaBr or KBr,is the
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Q90: What is the correct Lewis structure for