Question

Write the electronic configurations of two elements x and y whose atomic number are 20 and 17 respectively write the molecular formulas of the compound formed when elements x react with elements dot structure of the product and also state the nature of the bond formed between both the element

Answer 1

atomic number 20=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
atomic number 17=1s^2 2s^2 2p^6 3s^2 3p^5
the molecular formulas are 'ca' and 'cl'
2ca+cl2 =2cacl