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- Solve this problem The effect of lanthanoid contraction in the lanthanoid series of element by and large means ?
- #Joint Entrance Examination Main
- #Chemistry
- #d - and f - BLOCK ELEMENTS
- #All India Pre Medical Test
- #Engineering
The effect of lanthanoid contraction in the lanthanoid series of element by and large means ?
- Option 1)
Increase in both atomic and ionic radii.
- Option 2)
Decrease in atomic radii and increase in ionic radii.
- Option 3)
Decrease in both atomic and ionic radii.
- Option 4)
Increase in atomic radii and decrease in ionic radii.
Answers (1)
Lanthanoides -
The fourteen elements from Ce - Lu is Lanthanoids but the properties of La is much closer to lanthanoid.
- wherein
Electronic configuration of Lanthanoids -
The lanthanoid follow the 4f1-14 5d0-1 6s2 configuration (common configuration)with some exception due to full filled half filled electronic configuration.
- wherein
Radial node of lanthanoids -
- wherein
Properties of Lanthanoids -
The lanthanoids are silvery white soft metals and tarnish rapidly in air.The hardness increases with increasing atomic number.
- wherein
Pm is man made radioactive elements.
As we have learned in lanthoid contraction due to lathanoid contraction tends to atomic radii and ionic radii decreases gradually in the lanthanoid series.
Option 1)
Increase in both atomic and ionic radii.
Option 2)
Decrease in atomic radii and increase in ionic radii.
Option 3)
Decrease in both atomic and ionic radii.
Option 4)
Increase in atomic radii and decrease in ionic radii.
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