Which of the following is a lanthanide?A.Europium (Eu)B.Gold (Au)C.Barium (Ba)D.Americium (Am)
Question
Which of the following is a lanthanide?A.Europium (Eu)B.Gold (Au)C.Barium (Ba)D.Americium (Am)
Solution
The answer is A. Europium (Eu). This is because Europium is part of the lanthanide series, which includes the 15 metallic chemical elements with atomic numbers 57 through 71. Gold (Au), Barium (Ba), and Americium (Am) are not part of this series.
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