SOLVED: Strontium metal can be obtained by the electrolysis of molten bromide, SrBr2. Why is an atmosphere of argon used around the cathode? A) Argon keeps strontium molten. B) Argon stops the molten strontium rising too high in the tube. C) A thin film of a compound of strontium and argon forms on the surface, protecting the freshly formed metal. D) Without the argon, strontium oxide would form in the air. Please explain why it's A, B, C, or D.
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