The atomic numbers of two elements are 8 and 16 respectively. Write the electronic configuration of these two elements. Do you keep these two elements in the same group of the modern periodic table? Justify your answer. Find out which of these two elements is more electronegative. Give reason for your answer.

Explanation

Atomic number `8 to` Oxygen (O)
Electronic configuration: (2,6)
Atomic number `16 to`  Sulphur (S)
Electronic configuration: (2, 8, 6) 
• Yes, these two elements belong to the same group.
• Because in the outer most shell they have same number of electrons or both have same number of valance electrons.
• Element with atomic number 8 is more electronegative than the element with atomic number 16. Electro-negativity decreases down the group.