9th Class Science Structure of the Atom Question Bank Atomic Structure Conceptive Objective Problems

  • question_answer Which of the following statements is not correct?

    A)                                                                                             \[_{7}{{N}^{14}}\] and                                                                                           \[_{7}{{N}^{15}}\] are isotones

    B)                                                                                             \[_{7}{{N}^{14}}\] and                                                                                            \[_{6}{{C}^{14}}\] are isobars

    C)                                                                                              \[_{6}{{C}^{13}}\] and                                                                                            \[_{6}{{C}^{14}}\] are isotopes

    D)                                                                                              \[_{6}{{C}^{13}}\] and                                                                                           \[_{7}{{N}^{14}}\] are isotones

    Correct Answer: A

    Solution :

                                                                                                  \[_{7}{{N}^{14}}\] and                                                                                           \[_{7}{{N}^{15}}\] are isotopes but not isotones


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