NEET ChemistryClass 11Ionization enthalpyMediumAssertion–Reason

Magnesium and aluminium sit next to each other in period 3. Judge the Assertion (A) and the Reason (R) below.

Assertion (A): The first ionization enthalpy of magnesium is higher than that of aluminium.
Reason (R): The electron removed from aluminium is a 3p electron, which is shielded by the 3s electrons and lies higher in energy than a 3s electron.

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Magnesium and aluminium sit next to each other in period 3. Judge the Assertion (A) and the Reason (R) below.

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