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The element 'Sc' is known long back as...

The element 'Sc' is known long back as

A

Eka-aluminimum

B

Eka-boron

C

Eka-silicon

D

Eka-mercury

Text Solution

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The correct Answer is:
B
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NARAYNA-PERIODIC TABLE -All Questions
  1. The properties of the following elements were predicted by Mendeleeff ...

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  2. The number of elements known when Mendeleef presented periodic table i...

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  3. The element 'Sc' is known long back as

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  4. Which of the following is not an anomalous pair?

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  5. The number of periods in the long from of periodic table is

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  6. The total number of gaseous elements are

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  7. Which of the following remains unchanged in descending in a group in t...

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  8. In a period, elements are arranged in strict sequence of

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  9. Which of the following is not a representative element

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  10. The inert gas present in the second long period is

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  11. Mono atomic element among the following is

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  12. Which one of the following pairs of atomic numbers, represents element...

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  13. The atomic number of elements of first transition series lie in the ra...

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  14. In the long form of periodic all non-metals are placed in

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  15. All elements of the same group will have

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  16. The atomic number of an element is always equal to

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  17. Which of the following is not the electronic configuration of a repres...

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  18. Which of the following electronic configuration corresponds to an iner...

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  19. Which of the following electronic configuration in the outermost shell...

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  20. Lanthanum belongs to …. Block

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