AP EAMCET Engineering 17 Sep 2020 Shift 1 Paper

Section: Chemistry
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Question : 133 of 160
 
Marks: +1, -0
Assertion (A): Boron has a smaller first ionization enthalpy than beryllium
Reason (R): The penetration of a 2s electron to the nucleus is more than the 2p electron hence 2p electron is more shielded by the inner core of electrons than the 2s electrons.
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