Question

Explain why the first period of the periodic table is exception
in case of
Number of electrons increase from 1 to 8 in each period​

Answer 1

Answer:

Since going from right to left on the periodic table, the atomic radius increases, and the ionization energy increases from left to right in the periods and up the groups. Exceptions to this trend is observed for alkaline earth metals (group 2) and nitrogen group elements (group 15).