Question

In the third period, which is the most metallic and non-metallic element?

Answer 1

Metallic character decreases from left to right across a period. Sodium being the first element in the third period is the most metallic element, while chlorine is the most non-metallic element. However, argon is the last element in the third period but it has inert configuration due to which it doesn't either both metallic or non-metallic characters.