Identify the correct electron dot structure of nitrogen molecule in the following:

The atomic numbers of five elements A, B, C, D and E are $6,8, 3, 7$ and $9$ respectively. 

(i) Which is the element having the highest electropositivity among these elements? Why? 

(ii) Which is the element having the least metallic character among these elements? Why? 

(iii) What is your conclusion about the relationship between metallic character and electropositivity of an element? 

Observe the given table and answer the following question:

Identify the two elements that belong to the same period and the two elements that belong to the same group. Give a reason for your conclusion.