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What are lanthanoids ?...

What are lanthanoids ?

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The elements in which the last electron enter in the 4 f-orbitals is called lanthanoids. As they resemble each other and form a distinct group with lanthanum at the top, they are called Lanthanoids.
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ACCURATE PUBLICATION-D & F BLOCK ELEMENTS -2 OR 5 MARKS QUESTIONS
  1. What is the atomicity of the following : sulphur

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  2. What is the atomicity of the following : sodium

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  3. What are lanthanoids ?

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  4. Why are Lanthanides called inner transition metals.

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  5. What are different oxidation states exhibited by lanthanoids ?

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  6. What is lanthanoid contraction ?

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  7. Why is La(OH)3 more basic than Lu(OH)3 ?

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  8. Why Zr and Hf exhibit similar properties ?

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  9. Write the formulas of ammonia . Also name the elements presents in the...

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  10. Write the formulas of methane . Also name the elements presents in th...

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  11. Write the formula of sulphur dioxide . Also name the elements presents...

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  12. Write the formula of ethanol . Also name the elements presents in them...

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  13. Write the formula of calcium carbonate . Also name the elements presen...

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  14. Transition metals form number of interstitial compounds. Explain.

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  15. A transition metal easily form alloys with other transition metals. Ex...

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  16. Transition elements and their compounds are found to be good catalysts...

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  17. Why transition element show coloured Ions ? Explain.

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  18. Give the preparation of Potassium dichromate ,K2Cr2O7.

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  19. Write the formula of ammonium hydroxide . Also name the elements pres...

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  20. Write the formula of sodium sulphate . Also name the elements presents...

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