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  5. Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति

JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Extended or long form of periodic table

  • question_answer
    An element M has an atomic mass 19 and atomic number 9. Its ion is represented by

    A) \[{{M}^{+}}\]

    B) \[{{M}^{-}}\]

    C) \[{{M}^{2+}}\]

    D) \[{{M}^{2-}}\]

    Correct Answer: B

    Solution :

      \[{{M}^{-}}\] After gaining an \[{{e}^{-}}\] the metal attains stable configuration.


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