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Which one of the following is a differen...

Which one of the following is a different pair?

A

Li, Na

B

Be, Ba

C

N, As

D

O, At

Text Solution

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The correct Answer is:
D
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VK JAISWAL-PERIODIC PROPERTIES-Level 1
  1. Which of the following represents an excited state of an atom?

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  2. Choose the correct statement regarding transition elements?

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  3. Which one of the following is a different pair?

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  4. The element having electronic configuration [Kr] 4d^(10) 4f^(14) 5s^(2...

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  5. Which elements is named after the name of a planet is

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  6. Zn and Cd metals do not show varible valency because:

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  7. An element whose IUPAC name is ununtrium (Uut) belongs to

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  8. Which of the following is not representative element?

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  9. The period number and group number of "Tantalum" (Z=73) are respective...

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  10. Which of the following pair of elements belongs period of the periodic...

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  11. Consider the following electronic configuration of an element(P): [X...

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  12. Which of the following metal is highest electropositive (metallic) in ...

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  13. Which of the following species must have maximum number of electrons i...

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  14. which of the following graph is correct representation between atomic ...

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  15. If IUPAC name of an element is "unununium" then correct statement rega...

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  16. Which property decreases from left to right across the periodic table ...

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  17. Consider the following information about element P and Q: {:(,"Perio...

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  18. which must represent an atom in an excited state?

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  19. Which of the following anion has the smallest radius?

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  20. The ionic radii of Li^(+), Be^(2+) and B^(3+) follow the order:

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