Group VII.: H (?), monovalent; the halogens F, Cl, Br, I, usually monovalent, but possibly also triand pentavalent; Mn, divalent and trivalent, and possibly heptavalent in permanganates. [Please select]
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CLOSED TUBES FOR HEATING UNDER PRESSURE (_Carius method for determination of the halogens and sulphur.) [Please select]
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