AP EAMCET Engineering 17 Sep 2020 Shift 1 Paper
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Question : 133 of 160
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Assertion ( A ) : Boron has a smaller first ionization enthalpy than beryllium
Reason( R ) : The penetration of a 2 s electron to the nucleus is more than the 2 p electron hence 2 p electron is more shielded by the inner core of electrons than the 2 s electrons.
Reason
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