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What is ionisation energy? How does ioni...

What is ionisation energy? How does ionisation energy vary along the period in the modern periodic table ?

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The energy required to remove the electron from the outermost shell of an isolated gaseous atom is known as ionisation energy.
It increases while going from left to right in modern periodic table.
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Knowledge Check

  • The longest period in the Modern Periodic Table is the

    A
    Third period
    B
    Fourth period
    C
    Fifth period
    D
    Sixth period

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