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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic number, Mass number Atomic species

  • question_answer
    Nitrogen atom has an atomic number of 7 and oxygen has an atomic number 8. The total number of electrons in a nitrate ion will be            [Pb. PMT 2000]

    A)                 8             

    B)                 16

    C)                 32          

    D)                 64

    Correct Answer: C

    Solution :

               Number of electrons in nitrogen = 7 and number of electron is oxygen = 8 we know that formula of nitrate ion is \[NO_{3}^{-}\] we also know that number of electron                      = (1 × Number of electrons in nitrogen) + (3 × number of electrons in oxygen) + 1                                 = (1 × 7) + (3 × 8) + 1 = 32.


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