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Half life of fracium is...

Half life of fracium is ____________

A

12.3 years

B

12.3 mins

C

21 years

D

21 mins

Text Solution

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The correct Answer is:
D
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SURA PUBLICATION- ALKALI AND ALKALINE EARTH METALS-ADDITIONAL QUESTION ( ADDITIONAL CHOOSE THE CORRECT ANSWER)
  1. Rubidium belongs to group of metals

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  2. The radioactive element of group 1 is

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  3. Half life of fracium is

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  4. Electronic configuration of is block of elements is

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  5. The atomic and ionic radii of alkali metals on moving down the group.

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  6. Alkali elements exhibit an oxidation state of

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  7. The hydration enthalpies of alkali metal ions decreases in order.

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  8. The most electro positive element of the periodic table is

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  9. Consider the following statements 1. Alkali metals are soft. 2. ...

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  10. The alkali metals have low melting point. Which of the following alkal...

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  11. The reducing power of a metal depends on various factors. Suggest the ...

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  12. The order of decreasing ionisation enthalpy in alkali metals is

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  13. Which of the following is used in photoelectric cells ?

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  14. Metallic elements are described by their standard electrode potential,...

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  15. Which of the following are the correct reasons for anomalous behaviour...

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  16. ions are found in large proportions in biological fluids.

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  17. Which of the following ions are more responsible for transmission of n...

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  18. Spodumene is the silicate mineral of

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  19. Which of the following metals is most commonly used in photochemical c...

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  20. Which among the folJowing is the strongest reducing agent?

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