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Class 12 Exam  >  Class 12 Questions  >  The number of unpaired electrons in the eleme... Start Learning for Free
The number of unpaired electrons in the element with atomic number 100 are
    Correct answer is '2'. Can you explain this answer?
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    The number of unpaired electrons in the element with atomic number 100...
    The element with atomic number 100 is fermium. Its configuration is [Rn] 5f126d07s2.
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    The number of unpaired electrons in the element with atomic number 100...

    Explanation:

    Atomic Number 100:
    - The element with atomic number 100 is Fermium (Fm), which is a synthetic element.
    - Fermium has an atomic number of 100, meaning it has 100 protons in its nucleus.

    Electron Configuration:
    - The electron configuration of Fermium is [Rn] 5f12 7s2.
    - In order to determine the number of unpaired electrons, we need to look at the electron configuration.

    Unpaired Electrons:
    - The 5f subshell can hold up to 14 electrons, and in the case of Fermium, it has 12 electrons in the 5f subshell.
    - Since there are 12 electrons paired in the 5f subshell, there are 2 unpaired electrons in the 7s subshell.
    - Therefore, Fermium has 2 unpaired electrons.

    Conclusion:
    - In conclusion, the element with atomic number 100, Fermium, has 2 unpaired electrons based on its electron configuration.
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    The number of unpaired electrons in the element with atomic number 100 areCorrect answer is '2'. Can you explain this answer?
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