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10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    Identify the electronic configuration of a compound formed when a metal reacts with a halogen.

    A) 10, 18 = 28                    

    B) 12, 9 = 21        

    C) 7, 9 = 16                         

    D) 19, 17 = 36

    Correct Answer: A

    Solution :

    The common compound formed when a metal reacts with a halogen is \[NaCl\]. Sodium and chlorine combine to form sodium chloride, a common ionic compound with new e.c. as given below: \[Na=2,8(10),Cl=2,8,8(18)\]


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