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

9th Class Science Structure of the Atom Question Bank Structure of the Atom

  • question_answer
    An element has atomic number \[17\] and mass number\[37\]. There are \[17\] electrons outside the nucleus. Find the number of neutrons in it.

    A) \[20\]                              

    B) \[21\]

    C) \[17\]                

    D)        \[37\]

    Correct Answer: A

    Solution :

    \[Z=17;\,\,A=37\,\,n=A-Z=37-17=20\]


You need to login to perform this action.
You will be redirected in 3 sec spinner