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
    A tripositively charged ion of an element 'X' has the same number of electrons as in trinegatively charged \[{{\text{N}}^{-\text{3}}}\]. Identify 'X'.

    Answer:

    Number of electrons in\[{{N}^{3}}=7+3=10\] No. of electrons in \[{{X}^{+3}}=10\] \[\therefore \]No. of electrons in neutral atom of \[X=10+3=13\] \[\therefore \]No. of protons\[X=13\Rightarrow X\]is Aluminium


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