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

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

  • question_answer
                    Name a few elements whose mass number is double their atomic numbers.

    Answer:

    Helium\[{{(}_{2}}H{{e}^{4}}),\]Carbon\[{{(}_{6}}{{C}^{12}}),\]Nitrogen \[{{(}_{7}}{{N}^{14}}),\]Oxygen\[{{(}_{8}}{{O}^{16}}),\] etc.


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