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Which one of the following elements has ...

Which one of the following elements has lowest ionisation energy:
`H, Mg, Cs, B`
Report the Atomic number of that element.

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The correct Answer is:
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RESONANCE-PERIODIC TABLE & PERIODICITY-Exercise
  1. Where a, b,c, d, e,f,g, h ar 3^(rd) period elements. If difference bet...

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  2. Value of IE(1), IE(2), IE(3) of an element are 9.3, 18.2 and 553.8 eV....

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  3. Which one of the following elements has lowest ionisation energy: H,...

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  4. {:(A^(-) (g) rarr A^(2+)(g),,DeltaH = 1100KJ//mol),(A(g)rarrA^(2+)(g),...

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  5. The electron affinity of a hypothetical element 'A' is 3eV per atom. H...

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  6. What is atomic number of element which have maximum electron affinity ...

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  7. How many of the following are more electronegativity than Boron. H, Li...

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  8. The group in the modern periode table, in which all the elements do no...

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  9. Element corresponding to which of these//this atomic number belongs to...

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  10. Which of the following have greater Z(eff) than Zn:

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  11. Which of the following is/are correct regarding oxidation state of ele...

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  12. Which of the following elements have +3 as most popular oxidation stat...

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  13. Which of the following compounds are found to exist (General formula o...

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  14. Which of the following show non-zero multiple oxidation state?

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  15. Which of the following pairs of elements show similar set of oxisation...

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  16. Which of the following elements have their lower oxidation state as mo...

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  17. Which is /are the correct order/s of atomic radius?

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  18. Which is/are the correct order/s of atomic radius?

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  19. Which of the following orders is (are) correct for size:

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  20. The ionic radii depends upon in the following factors:

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