What is the difference between period 4 and 5 on the periodic table?

Answer 1

There are 4 electronic shells in period 4 while there are 5 shells in period 5.Elements of period 4 are smaller in size as compared to elements of period 5.Example of period 4 element is potassium and period 5 element is tin.

Answer 2

Period 4 has elements filling the 4th energy level, while Period 5 has elements filling the 5th energy level. This means that Period 5 elements have an additional electron shell compared to Period 4 elements. Period 5 elements also exhibit trends such as increasing atomic size and metallic character compared to Period 4.