Q. 17 3.9( 35 Votes )

Two elements X and Y have atomic numbers 12 and 16 respectively. To which period of modern periodic table do these two elements belong? What type of bond will be formed by them and why? Also give the chemical formula formed by these compounds.

Answer :

The electronic configuration of element X is 2,8,2. Now, as it has 2 electrons in its outer most shell or in its valence shell. Therefore, it belongs to the period 3 (group 2) of the modern periodic table. The element is Magnesium (Mg). Similarly, the EC of element Y is 2,8,6. Now, as it has 6 electrons in its outer most shell or in its valence shell. Therefore, it belongs to the period 3 (group 6) of the modern periodic table. The element is Sulphur (S).

They will form ionic bond by sharing their electrons to complete their octets.


The chemical compound formed by them is MgS.


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