Assertion: technetium | /r/AtLocation | oxidation states of +7
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Source sentences:
text: Technetium, chemically similar to rhenium (atomic number 75), exists in oxidation states of +7, +6, and +4 in compounds such as potassium pertechnetate, KTcO 4 , technetium chloride, TcCl 6 , and technetium sulfide, TcS 2 , respectively.