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D01 Inorganic Chemicals D007287 +
D01.268 Elements D004602 +
D01.268.271 Elements, Radioactive D004603 +
D01.268.271.870 Technetium D013667
D01 Inorganic Chemicals D007287 +
D01.268 Elements D004602 +
D01.268.556 Metals, Heavy D019216 +
D01.268.556.843 Technetium D013667
D01 Inorganic Chemicals D007287 +
D01.268 Elements D004602 +
D01.268.956 Transition Elements D028561 +
D01.268.956.875 Technetium D013667
D01 Inorganic Chemicals D007287 +
D01.552 Metals D008670 +
D01.552.544 Metals, Heavy D019216 +
D01.552.544.843 Technetium D013667