Question

metallic character goes on increasing while going from left to right in a period​

Answer 1

Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell. Metallic character increases as you move down an element group in the periodic table.

Answer 2

Wrong it should metallic character decreases when we move left to right along a period

When we move left to right in a period, the atomic size decreases and the effective nuclear charge increases on the valence electrons