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Atomic Structure

9th Standard Science - Atomic Structure Two Marks Question

Atomic Structure Two Marks Question

9th Standard

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Science

Time : 00:45:00 Hrs
Total Marks : 20
    10 x 2 = 20

  1. Name an element which has the same number of electrons in its first and second shell

  2. Write the electronic configuration of K and Cl

  3. Copy the following and write the names of the laws and their simple definitions in the space provided.

  4. What is combination reaction ?

  5. What are the limitations of Rutherford's model?

  6. What are the limitations of Bohr's model of an atom?

  7. Define an orbit.

  8. Name the other particles present in the Nucleus of an atom.

  9. An atom is electrically neutral. Why?

  10. Calculate the number of electrons present in the third (M) and fourth (N) orbits

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