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प्रश्न
Which among the following elements is radioactive?
विकल्प
Eu
Nd
Pm
Lu
MCQ
उत्तर
Pm
Explanation:
Promethium (Pm) is the only radioactive lanthanide.
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क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
Which among the following elements is radioactive?
Eu
Nd
Pm
Lu
Pm
Explanation:
Promethium (Pm) is the only radioactive lanthanide.