2. Questions Bank
  3. 9th Class
  4. Science
  5. Structure of the Atom

9th Class Science Structure of the Atom Question Bank Atomic Structure Formative Subjective Problems

  • question_answer
    The total number of electrons in \[NO_{3}^{-}\]ion is (a) 15                                     (b) 32    (c) 31                                     (d) 46

    Answer:

    The number of electrons in\[NO_{3}^{-}\] \[=7+3\times 8+1=7+24+1=32\]


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