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Mendeleev corrected the atomic weight of...

Mendeleev corrected the atomic weight of :

A

Be

B

N

C

O

D

Cl

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The correct Answer is:
A
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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-CLASSIFICATION OF ELEMENTS AND PERIODICITY -C.U.Q
  1. The basis for the classification of elements in the modern periodic t...

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  2. Considering the chemical properties, atomic weight of Be was corrected...

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  3. Mendeleev corrected the atomic weight of :

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  4. Anamalous pair in Mendeleef's table is

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  5. Eka silicon is now called as

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  6. The atomic weights of "Be" and "In" were correctly by Mendeleef using ...

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  7. The plot of sqrt(v) vs Z is

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  8. The longest and shortest periods are

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  9. The number of elements present in the fourth period is

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  10. The general electronic configuration elements of carbon family

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  11. The strong element of fifth period is

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  12. Which of these does not reflect the periodicity of the elements.

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  13. The atomicity of noble gases is

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  14. The element with atomic numbers 19 is

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

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  16. The element with electron configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)...

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  17. The element with ns^(2)np^(4) as outer electron configuration is a

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  18. If the differentiating electron enters (n-1) d-sublevel. The element i...

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  19. Atoms with three of their outer most orbits incompletety filled with e...

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  20. The name of the element with atomic number 100 was adopted in honour o...

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