metallic characters
Metallic character is a name given to elements that are metals and their chemical properties.
The metallic character of an element decreases as you move from left to right or bottom to top of the periodic table. This is because atoms have a better ability to gain electrons to fill a valence shell than lose them to and an unfilled shell. In other words, it increases as you go from right to left or top to bottom. Metallic character is dependent on an element's ability to lose its valence electrons. This is because the loss of electrons becomes easier as the atomic radius increases and the attraction between the nucleus and valence electrons becomes weaker as the distance between them increases.
As an example, the metallic character of Beryillium (4), would not be as great as the metallic character of Barium (56).