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Lanthanoid contraction is caused due to:...

Lanthanoid contraction is caused due to:

A

The imperfect shielding on outer electrons by 4f-electrons from the nuclear charge

B

The appreciable shielding on outer electrons by 4f-electrons from the nuclear charge

C

The apperciable shielding on outer electrons by 5d-electrons from nuclear charge

D

The same effective nuclear charge from `Ce` to `Lu`

Text Solution

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The correct Answer is:
A
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NARAYNA-PERIODIC TABLE -All Questions
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  2. Among elements with the following electromic configurations, the one w...

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  3. Lanthanoid contraction is caused due to:

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  4. A reduction in atomic size the increases in atomic number is a charact...

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  5. Identify the correct order in which the ionic radius of the following ...

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  6. The radii of F,F^(-),O and O^(-2) are in the order of

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  7. Of the folowing, the one with largest size is

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  8. The order of decreasing atomic radii for Be, Na & Mg is

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  9. Which of the following has the highest ionic radius?

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  10. The value of 1 eV/ atom is

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  11. For any atom, the order of ionization potential value is

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  12. The high ionistion potential of magnesium compared with aluminium, is ...

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  13. The correct order of ionization values of Be, B, Li, C atom is

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  14. The ionisation energy is lowest for

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  15. The element with highest ionisation potential is

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  16. Which one of the following is correct order of second ionisation poten...

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  17. The I(1) value of potassium is less than the I(1) value of sodium. Thi...

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  18. The ionization potential of elements in any group decreases from top t...

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  19. The first ionization energy of lithium will be

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  20. Which has maximum first ionization potential?

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