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"The properties of elements are the peri...

"The properties of elements are the periodic functions of their atomic masses"

A

Dobereiner traid

B

Newland's law of octaves

C

Mendeleeff's periodic law

D

Bohr's model

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Which of the following statements are correct for classification of elements? I. The properties of elements are periodic function of their atomic numbers. II. Non-metallic elements are less in number than the metallic elements. III. The first ionisation energies of elements along a period do not vary in a regular manner. IV. The ground state electronic configuration of Pd (Z = 46 ) is [Kr] 4 d 5s^(2) .

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BEYOND PUBLICATION-CLASSIFICATION OF ELEMENTS THE PERIODIC TABLE-EXERCISE
  1. Moseley calculated the number of positive charges in the atoms by anal...

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  2. Elements with electronic configuration ns^1 and ns^2 are called

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  3. Atomic weight =

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  4. No. of groups in modern periodic table................

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  5. According to Mulliken, electronegativity =

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  6. Elements from ^(58)Ce to ^(71)Lu are called

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  7. Correct order of size

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  8. Electron affinity of Fluorine is less than that of Chlorine because

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  9. In dobereiner triad, the atomic weight of middle element is :

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  10. Which of the following relation is correct ?

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  11. 5f elements are called............

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  12. Periodicity is observed in periodic table due to reappearance of simil...

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  13. The formula of oxides and chloride of Eka-Silicon is

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  14. Which block the element having 1s^2 2s^2 2p^4 beongs to ?Why ?

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  15. Which elements are called p-block elements ?

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  16. What is the valency of IVA group elements with respect to hydrogen ?

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  17. Because of screening effect, the ionization energy becomes less. Expla...

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  18. "The properties of elements are the periodic functions of their atomic...

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  19. Write few sentences about Newland's law of octaves. The elements pres...

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  20. Electron gain enthalpy is known as

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