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Lanthanoids are-...

Lanthanoids are-

A

14 elements in the seventh period (Atomic no. =58 to 71) that are filling 4f subshell

B

14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f subshell

C

14 elements in the seventh period (atomi no. = 90 to 103) that are filling 5f subshell

D

14 elements in the sixth period (atomic no = 58 to 71) that are filling 4f subshell

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The correct Answer is:
D
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BANSAL-PERIODIC TABLE-EXERCISE-1
  1. Which of the following factors may be regarded as the main cause the l...

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  2. The size of the species, Pb,Pb^(2+), Pb^(4+) decreases as -

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  3. A Ketelaar triangle showing a plot of average electrongativity (chi(me...

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  4. Match list-I with list-II and select the correct answer using the code...

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  5. The actinoids exhibit more number of oxidation states in general than ...

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  6. For the process X(g) +e^(-) rarr X^(-)(g), DeltaH = x and X^(-)(g)...

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  7. Sodium forms Na^(+) ion but it does not form Na^(+2) because -

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  8. Lanthanoids are-

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  9. Bond distance C-F in (CF(4)) & Si-F in (SiF(4)) are respective 1.33 Å...

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  10. The lowest electronegativity of the element from the following atomic ...

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  11. The correct order regarding the electronegativity of hybrid orbitals o...

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  12. If there were 10 periods in the periodic table then how many elements ...

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  13. The correct order of increasing hydration energy of following ion is

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  14. Consider the M(OH)(3) formed by all the group 13 elements. The correct...

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  15. (a),(b) and (c) are elements in the second short period. Oxide of (a) ...

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  16. Set containng isolectronic species is-

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  17. Mendeleev's periodic table is based on atomic masses of elements. It w...

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  18. If the ionic radii of each K^(+) and F^(-) are 1.34Å, then tha atomic ...

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  19. The As-CI bond distance in AsCI(3) is 2.20 Å. Estimate the SBCR (singl...

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  20. The IE values of Al((g)) = Al^(+) +e is 577.5 kJ mol^(-) and DeltaH fo...

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