最終更新日：2024/07/30
Nielsbohrium is a synthetic chemical element with the symbol Nb and atomic number 107.
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Nielsbohrium is a synthetic chemical element with the symbol Nb and atomic number 107.
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Nielsbohrium is a synthetic chemical element with the symbol Nb and atomic number 107.
Nielsbohrium is a synthetic chemical element with the symbol Nb and atomic number 107.
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