1.

Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electron-dot structure. What is the nature of the bond formed?

Answer»

Solution :The electronic configuration of element A with atomic number 19 is 2, 8, 8, 1. It has one VALENCE electron and valency of +1.
The electronic configuration of element B is 2, 8, 7. It has 7 valence ELECTRONS and valency of -1. Hence, the formula of the PRODUCT formed is AB. Its electron-dot structure is: 


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