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QJEEM20Ch4b2b: JEE Main 2020 Chemistry - Class 11 JEEM20Ch4b2b Solution: The atomic number of Unnilunium is _______.

The atomic number of Unnilunium is _______.

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Historically, the systematic (IUPAC temporary) name "Unnilunium" was used for the element with the atomic number 101, which is now officially named Mendelevium. Thus,

101\boxed{101}

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