Question

Explain the variation in trends in period in following properties

Answer 1

Answer:

I guess your question 'following properties' justifies this question:-

Explain giving justification the trends in the following properties of elements, on moving from left to right in a period, in the Modern periodic Table. (a) Variation of valency. (b) Change of atomic radius. (c) Metallic to non-metallic character. (d) Electronegative character. (e) Nature of oxides.

Explanation:

Properties of elements, on moving from left to right in a period, in the Modern Periodic Table:

 

(a) Variation in valency:

    Valency of elements with respect to hydrogen increases arithmetically from 1 to 4 and back to 1.

 

(b) Atomic radius:

    The atomic radius decreases on moving from left to right in a period.

 

(c) Metallic and Non-metallic Properties:

    As the effective nuclear charge increases across the period, the tendency to lose the electrons will decrease.

    So, the metallic character decreases across the period.

 

(d) Nature of oxides:

    Oxides of elements in a period become progressively less basic and finally change to the acidic character.