Question

(b) Two elements X and Y have atomic numbers 12 and 16 respectively. Write the electronic configuration for these elements. To which period of the modern periodic table do these two elements belong? What type of bond be formed between them and why?

Answer 1

1. The element X has atomic number 12 and element Y has atomic number 16. The electronic configuration of X will be 2, 8, 2 and that of Y will be 2, 8, 6.
2. The number of shells is an element is equal to the period to which it belongs. X element has 3 shells so it will belong to 3rd period, Y will also belong to 3rd period as it has 3 shells.
3. The elements X and Y will form ionic bond as X has 2 valence electrons and it will give those electrons to element Y as it requires 2 more electrons.