First ionisation energies of second period elements show that the values increase from lithium to beryllium, decrease for boron, and increase up to nitrogen, again decrease in oxygen and finally increase up to neon. Explain.

The first ionization energies of the second-period elements exhibit distinct trends, which can be explained by considering atomic structure and electron configuration.

1. Lithium to Beryllium: The ionization energy increases from lithium to beryllium because beryllium has a higher nuclear charge (Z = 4) compared to lithium (Z = 3), leading to a stronger attraction between the nucleus and the valence electrons. This stronger attraction makes it harder to remove an electron, hence a ______ _________ ______ ______ ___ __________ ___ ________ _____ _____ ___.
   _____ _______ ___ ______ _____ ____.
   ____ _________ ____ __________ _______ ___ _______ ____ ___ _________ __________.
   _______ ____ ____ ____ ___ ___ ___ _____ _____.
   ___ _______ ____ ___ ______ __________ ____ _________ ___ _______.
   _____ __________ __________ ___ _____ _____ __________ ____.
   _______ ________ ___ __________ _________ ____.
   _____ _______ _______ ____ ______ ________ _________ _____ ______.
   ___ ___ _________ ________ _________ ______.
   _______ _______ __________ __________ ______ _____ ________ ____.
   __________ ________ __________ __________ _________.
   _________ _______ _________ _______ _________ ________ __________ __________ _____ ________ __________ _________.
   ______ _______ __________ _______ ___ _________ _____ ____ ______ ____ _______.
   _________ ____ ________ __________ _____.
   _______ __________ ____ ___ _____ ______ ______ ________ __________ ______ _________ ________.
   ____ ______ __________ ______ ___ _________ __________ __________.
   ________ ____ _________ ___ ____ _____ ___ _____ ______ _______ ________.
   _______ ____ ___ _______ ______ ____ ______ ______ __________ ________ ___ ________.
   ____ __________ _______ _____ _________ ____ __________ _______ _______ __________ ____.
   __________ _____ ________ _______ __________ ______ ________ __________ __________ __________ __________.
   ___ __________ ______ ____ _________.
   _____ _________ ________ _____ ______ _____ ________ __________ _________ ________.
   ____ ______ _____ _____ ____ ___ _________ _____ ___ ______ _____.
   ___ ___ _________ ___ __________ _____ _______ _________ _______ _____.
   ___ __________ __________ ___ ______ ____ ______ __________.
   Get Full Answer on WhatsApp