JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties Question Bank Valency and oxidation state

  • question_answer
    An element of atomic weight 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statements regarding this element is not correct

    A) It belongs to II group of the periodic table

    B) It has 20 neutrons

    C) The formula of its oxide is \[M{{O}_{2}}\]

    D) It belongs to 4th period of the periodic table

    Correct Answer: C

    Solution :

    Its valency is 2. So it will form MO type compound.


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