Write the electronic configuration of two elements X and Y whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element X reacts with element Y. Draw electron-dot structure of the product and also state the nature of the bond formed between both the elements.
Electronic configuration of X = 2,8,8,2
Electronic configuration of Y = 2,8,7
Molecular formula :
X has two extra electrons hence X has +2 valency Y needs 1 electron to be stable hence Y has -1 valency.
Type of bond - Ionic Bond