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Assertion : Generally, ionization enthalpy increases from left to right in a period.
Reason : When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.
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Reason : When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.
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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
Ionization enthalpy depends upon two factors:
(a) the attraction of electrons towards the nucleus,
and
(b) the repulsion of electrons from each other.
(a) the attraction of electrons towards the nucleus,
and
(b) the repulsion of electrons from each other.
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