Question

Assertion: Boron has smaller first ionization enthalpy than beryllium.

Reason: The penetration of a 2s electron to the nucleus is more than 2p electron hence 2p electron is

more shielded by the inner core of electrons than the 2s electron​

Answer 1

Answer:

(ii) While revolving in discrete orbits the electrons do not radiate energy. These orbits or shells are called energy levels. ... Similarly, for n = 2, it is L shell, for n = 3, it is M - shell and for n = 4, it is N - shell. These orbits or shells are also called energy levels.

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