Chemistry, asked by arjunkirde7, 9 months ago

the lanthanoid which obtained only by syntheses

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Answered by Anonymous

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Pm is the lanthanide, which is obtained only by synthesis. A lanthanide is a metallic chemical element with an atomic number between 57 and 71. The name of the lanthanide with the chemical symbol Pm is Promethium and it is a radioactive element with an atomic number 61.

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