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Number of elements present in 5th period...

Number of elements present in 5th period is

A

8

B

18

C

32

D

24

Text Solution

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The correct Answer is:
B
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DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
  1. Which one of the following groupings represents a collection of isoele...

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  2. Arrange in order of increasing I.P.

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  3. Number of elements present in 5th period is

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  4. What is the general outer electronic configuration of the coinage meta...

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  5. How does the ionisation energy of 1st group elements very ?

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  6. The electron gain enthalpy values (in kJ mol^(-1) ) of three halogens,...

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  7. An atom with high electronegativity has

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  8. In any period of the periodic table, valency of an element with respec...

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  9. For the electron affinity of halogens (with -ve sign), which of the fo...

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  10. The elements with atomic numbers 9, 17, 35,53, 85 and all

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  11. In a given shell, the order of screening effect is

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  12. Correct order of radii is

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  13. Which one of the following sets of ions represents the collection of i...

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  14. Among Al(2)O,SiO(2),P(2)O(3) and So(2) the correct order of acid stren...

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  15. The formation of the oxide ion O^(2-)(g) requires first an exothermic ...

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  16. Which one of the following ions has the highest value of ionic radius?

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  17. Ionic radii are

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  18. Four successive members of the first row transition elements are liste...

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  19. Which of the following oxides is amphoteric is nature ?

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  20. In which of the following arrangements the order is NOT according to t...

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