ChemistryIf the atomic size of an element is less, then [[1]] (more/less) ionisation enthalpy is required.

If the atomic size of an element is less, then [[1]] (more/less) ionisation enthalpy is required.

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    Solution:

    • The ionisation enthalpy is the energy required to remove an electron from an atom or ion.
    • If the atomic size of an element is small,  the force of attraction between the electrons in the outermost orbit and the nucleus will be more. 
    • This makes the removal of electrons difficult, and thus the ionisation enthalpy will be more.
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