The metallic character of an element is defined as the easiness of its atom is losing electrons.
- According to the modern periodic table, the metallic character of an element decreases while moving from left to right across a period.
- This happens due to the fact that while moving from left to right in a period, the number of electrons and protons in an atom increases and this causes an increase in nuclear force on the electrons and hence losing electrons becomes difficult.
- Metallic character increases down the group, and this happens because while moving down the group, atomic radius increases and hence it becomes easier to lose electrons.
Ge < Ga < Mg < Ca < K