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6. Write the electronic configuration of two elements X and Y whoseatomic numbers are 20 and 17 respectively. Write the Molecularformula of the compound formed when element X reacts withelement Y. (3)

Answer»

[fig:electron dot structure of cacl2]

x(ca)atomic no-20 electronic configuration =2,8,8,2y(cl)atonic no-17electronic configuration =2,8,7

when x(ca) react with y(cl).it can form cacl2ca+cl-cacl2

Electron dot structure of cacl2 has ionic bond

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