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Lanthanoids are...

Lanthanoids are

A

14 elements in the sixth period (atomic no. = 58 to71) that are filling 4f sublevel

B

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

C

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

D

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

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The correct Answer is:
A
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Lanthanoid are:

Lanthanoids and actinoids.

Lanthanoid series contains_____________elements.

TARGET PUBLICATION-D AND F-BLOCK ELEMENT -COMPETITIVE THINKING
  1. Potassium permanganate is used.

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  2. Which of the following is Baeyer's reagent ?

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  3. Lanthanoids are

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  4. The atomic number of Gadolinium (Gd) is 64. The CORRECT electronic con...

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  5. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  6. Which of the following oxidation states is the most common among the l...

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  7. Which is the oxidation state generally found in lanthanides?

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  8. Which one of the following lanthanide ions does NOT exhibit paramagnet...

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  9. Which of the following lanthanoids ions is diamagnetic?

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  10. What is the general molecular formula of the products obtained on heat...

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  11. Reason of lanthanoid contraction is

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  12. In lanthanoids , atomic radius decreases as atomic no. increases becau...

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  13. The most basic hydroxide from the following is

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  14. Because of lanthnoid contraction, which of the following pairs of elem...

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  15. Which of the following pairs has the same size ?

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  16. Identify a 'Chemical twin' among the foolowings.

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  17. Which of the following statement(s) is/are incorrect for pair of elem...

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  18. Which of the following is NOT an actinide?

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

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  20. The reason for greater range of oxidation state in actinoids is attrib...

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