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Mendeleev corrected the atomic weight of...

Mendeleev corrected the atomic weight of :

A

Be

B

In

C

Os

D

All of these

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The correct Answer is:
D
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Medeleeff corrected the atomic weight of :

Mendeleff corrected the atomic weight of

How many of the following statements are correct according to Mendeleef's period table ? (a) Mendeleef corrected the atomic weight of Be, In and Os b) Ar-k, Te-I and Co-Ni are anomalous pairs. c) Atomic weights of elements were corrected by using the relation Atomic Wt. (Eq.Wt) (valency) d) Eka baron is scandium e) Eka silicon is germanium f) Eka aluminium is galium g)This classification is based on valency h) Mendeleef's law is based on atomic weights

Which of the following is the correct squence of atomic weights of given elements?

What is the atomic weight of Lithium?

If A,B and C are the three elements of Dobereiner's Traid and atomic weight of A and B are 7 and 15 respectively then the atomic weight of C is:

Assertion (A): Mendeleev arranged element in horizontal rows and vertical columns. Reason (R): Mendeleev ignored the order of atomic weight thinking that the atomic measurements might be incorrect.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as : Assertion (A) : Mendeleev's arranged element in horizontal rows and vertical columns. Reason (R) : Mendeleev's ignored the order of atomic weight thinking that the atomic measurements might be incorrect.

NARAYNA-PERIODIC TABLE -All Questions
  1. In the modern periodic table, elements are arranged in order of increa...

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  2. In the modern periodic table, elements are arranged in order of increa...

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  3. Mendeleev corrected the atomic weight of :

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  4. Zero group was introduced by

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  5. According to Mendeleef's periodic law, the properties of elements are ...

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  6. Total number of group in Mendeleef's table

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  7. In Mendeleef table, the triad of VIII group is

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  8. Number of short periods in Mendeleef table

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  9. The properties of the following elements were predicted by Mendeleeff ...

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

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

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

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

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  14. The total number of gaseous elements are

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

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

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  17. Which of the following is not a representative element

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

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  19. Mono atomic element among the following is

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

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