element y has 8 shells.
the first three successive ionisation energies for element y increase gradually but the 4th ionisation energy increases sharply.
a)write electronic configuration for
elment y & explain.

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periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.