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The atmoic radii of palladium and platin...

The atmoic radii of palladium and platinum are nearly same. Why?

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Due to lanthanide contraction (poor shielding of nuclear charge by `4f`-electrons), atomic radii of `4d` and `5d` elements are nearly same.
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RESONANCE-PERIODIC TABLE & PERIODICITY-Exercise
  1. Arange the following in correct order of stability. (i) Ga' In, TI' ...

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  2. Explain why callions are smaller and anions larger in radii than their...

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  3. The atmoic radii of palladium and platinum are nearly same. Why?

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  4. In the ionic compound KF, the K^(+) and F^(-) ions are found to have p...

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  5. Why second ionization enthalpy is always higher than the first ionisat...

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  6. The first ionization enthalpy of carbon is greater than that of boron,...

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  7. Among the elements B, AI,C and Si, (i) Which elements has the highes...

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  8. Be and Ne have positive values of electron gain enthalpy against the g...

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  9. Nitrogen has positive electron gain enthalpy whereas oxygen has negati...

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  10. Among alkali metals, which element do you expect to be least electrone...

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  11. Explain the following according to Modern periodic table: ltbr. (a) El...

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  12. The period number in the long form of the periodic table is equal to:

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  13. Which one of the following statements related to the modern periodic t...

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  14. The elements in which electrons are progressively filled in 4f-orbital...

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  15. Which of the following statements is not correct regarding hydrogen:

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  16. Atomic number of Ag is 4.7. in the same group, the atomic numbers of e...

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  17. In modern periodic table, the element with atomic number Z = 118 will ...

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  18. The order of screening effect of electrons of s, p, d and f orbitals o...

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  19. Which of the following is generally true regarding effective nuclear c...

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  20. Among following species which of them have maximum Z(eff)

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