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出典:Wikipedia
出典:『Wikipedia』 (2011/07/01 11:39 UTC 版)
A Group 7 element is one in the series of elements in group 7 (IUPAC style) in the periodic table, which consists of the transition metals manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh).
Group 7 element