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The atomic radii of two elements "X" and...

The atomic radii of two elements "X" and "Y" are `0.72 A^(0)` and `1.6A^(0)`. Then the elements "X" & "Y" are

A

F & Ne

B

Ne & F

C

Li & Be

D

Fe & `Fe^(2+)` ion

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The correct Answer is:
A
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NARAYNA-PERIODIC TABLE -All Questions
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  2. The covalent and Van der wall's radii of chlorine respectively are

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  3. The atomic radii of two elements "X" and "Y" are 0.72 A^(0) and 1.6A^(...

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  4. Among O,C,F,Cl and Br the increasing order of atomic radii is

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  5. The ionic size decreases in the order

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  6. The group of elements with highest second ionisation energy is

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  7. Which of the following transitions do represents first ionisation pote...

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  8. In a period element with large radius is a

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  9. The first, second, third and fourth, ionization potential values of an...

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  10. Ionization energy is high for

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  11. The removal of an electron is very difficult from

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  12. Which one of the following elements has the highest ionisation energy?

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  13. The ionization potential for hydrogen atom is 13.6 eV, the ionization ...

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  14. The IP(1) of O,S,RF & Cl are in the order of

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  15. The I.P(1)'s of N,P,O & S are in the order of

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  16. The correct order of ionization energies is

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  17. Configuration that shows the highest energy released when an electron ...

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  18. The electron affinity values of element A, C and D are respectively -1...

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  19. Energy is released during the formation of

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  20. Which of the following is not the reason for the higher EA(1) of halog...

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