Question

How do the following change on moving from left to right in a period of the periodic table?
Give examples in support of your answer.

Chemical reactivity of elements ?

Answer 1

The metallic character decreases as we move from left to right while the non metallic character increases.
Ongoing from left to right in a period, the chemical reactivity of elements first decreases and then increases.
For example in period 3, Sodium is the most reactive metal and Chlorine is the most reactive non-metal and Silicon is least reactive