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When a radius atom, which is placed in t...

When a radius atom, which is placed in the Iind group loses an alpha-particle forming a new element , it should be placed in …… the group

A

Second

B

First

C

Fourth

D

Zero group

Text Solution

Verified by Experts

The correct Answer is:
D
After `alpha-` decay , the daughter elements shift two places left in the periodic table. Therefore, new element is to the left of I group means zero group (now called 18 th group).
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DINESH PUBLICATION-NUCLEAR AND RADIO CHEMISTRY-Evaluate Yourself
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  2. One among the following set of quantum numbers defines the highest ene...

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  3. If threshold wavelength (lambda(0)) for ejection of electron from meta...

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  4. All elements in the third period have

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  5. One among the following species is planar

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  6. From amongst the following triatomic molecules the least bond angle is...

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  7. The atoms/ion listed in correct order of increasing size are

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  8. The solution of Schrodinger equation for hydrogen leads to three quant...

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  9. In which of the following are all the electrons paired ?

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  10. The diamagnetic molecules from among mole cules of second period eleme...

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  11. Which of the following statements is correct ?

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  12. Amongst phosphorus halides the correct increasing order of bond angle ...

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  13. The State of hybridisation of phosphorus (Z=15) in phosphate ion (PO(4...

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  14. The strength of sigma bond formed by s-s, s-p & p-p overlaps are in th...

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  16. A binary solid, A^(+) B^(-) ( formula mass= 60) has a CsCl structure....

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  17. The molecular orbital shown below is described as

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  18. Which among the following molecules has the largest dipole moment ?

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