How do the following traits change in a period from left to right in the periodic table : (a) Atomic size (b) Valency (c) Metallic character.

How do the following traits change in a period from left to right in t

1.	How do the following traits change in a period from left to right in the periodic table : (a) Atomic size (b) Valency (c) Metallic character.
Answer» Solution :(a) ATOMIC size decreases as we move from left to right in the Periodic Table. This is because the electrons are added to the same shell. Because of increased ATTRACTION between the nucleus and the electrons, atomic size decreases. (b) Valency increases as we move from left to right to some point after which it decreases. Valency depends upon the number of electrons which an atom can LOSE, gain or share with other atoms. (c) Metallic character decreases as we move from left to right in the Periodic Table. Metallic character means tendency to lose electrons. On MOVING from left to right, the force of attraction between the nucleus and valence electrons increases. THEREFORE elements have smaller and smaller tendency to lose electrons.