what are the various factors due to which the ionisqtion enthalpy of the main group elements tends to decrease down the group
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The factors responsible for the ionization enthalpy of the main group elements to decrease down a group are listed below: (i) Increase in the atomic size of elements: As we move down a group, the number of main energy shells(n) increases. As a result, the atomic size also increases gradually on moving down a group.
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Ionization enthalpy is a minimum amount of energy required to remove an electron from the outermost orbital. Ionization enthalpy of the main group elements tends to decrease down the group due to the following factors such as atomic size, shielding or screening effect and nuclear charge.
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