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How many elements are there in 6^(th) pe...

How many elements are there in `6^(th)` period? Prove it.

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In sixth period, 32 elements are present. This period starts with the filling of `6^(th)` energy shell, n=6. There are sixteen orbitals (one 6s, seven 4f, five 4d and three 6p) to be filled. These sixteen orbitals can accommodate 32 `(16xx2=32)` electrons. Hence, 32 elements are present in sixth period.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Additional Questions(3 MARK QUESTIONS)
  1. Write about the electronic configuration of 1^(st) and 2^(nd) period.

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  2. How many elements are there in 4^(th) period? Prove it.

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  3. How many elements are there in 6^(th) period? Prove it.

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  4. What are the two exceptions of block division in the periodic table?

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  5. Explain about the salient features of metals.

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  6. Explain about the characteristic of non - metals.

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  7. Periodic change in electronic configuration is responsible for the phy...

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  8. What is covalent radius ? . How would you determine the covalent radiu...

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  9. Define metallic radius.

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  10. Arrange Na^(+),Mg^(2+) and Al^(3+) in the increasing order of ionic ra...

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  11. Arrange the ions F^(-),O^(2-) and N^(3-) in the increasing order of th...

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  12. Mention some characteristics of ionization energy.

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  13. Why ionization energy and electron affinity are calculated in gaseous ...

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  14. How does the shielding effect caused by inner electrons affect the ion...

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  15. Ionization energy of Mg is greater than that of Al. Why?

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  16. What are factors which influence the electron gain enthalpy ?

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  17. Give the general variation of electron gain enthalpies in the periodic...

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  18. Explain about the electronegativity and non-metallic character across ...

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  19. Prove that valency is a periodic property.

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  20. Write a note about periodic trends and chemical reactivity.

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