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The first element of rare earth metals i...

The first element of rare earth metals is

A

Cerium

B

Actinium

C

uranium

D

Lanthanum

Text Solution

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The correct Answer is:
D
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DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
  1. Which among the following elements have lowest value of IE1?

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  2. Which of the following pair of elements belongs period of the periodic...

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  3. The first element of rare earth metals is

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  4. The oxide of which of the following elements will be acidic in charact...

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  5. Generally, the valency of noble gases is

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  6. Paulings electronegativity values for elements are useful in predictin...

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  7. The number of elements in the 4th period of periodic table is

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  8. Which period of the periodic table contains maximum number of elements...

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  9. In the second period of periodic table, the ionisation potential of el...

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  10. The valence shell electronic structure of an element is ns^2 np^2. The...

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  11. Which of the following pair of atomic numbers represents s-block eleme...

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  12. Atoms with high value of IE1 always have

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  13. The elements with atomic number 26 will be found in group

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  14. Among the following elements which one has the highest value of first ...

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  15. Which of the following ion is not isoelectronic with O^(2-) ?

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  16. The lightest metal is

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  17. The melting point is lowest for

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  18. Among O,C,F,Cl and Br the increasing order of atomic radii is

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  19. Which of the following gaseous ion contains maximum number of unpaired...

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  20. Which of the following is isoelectronic with carbon?

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