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Which of the following sets of atomic nu...

Which of the following sets of atomic numbers corresponds to the atomic numbers of inert gases belonging to periods which contain 4d and 5d transition series ?

A

56,85

B

55,87

C

54,86

D

36,54

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BEYOND PUBLICATION-CLASSIFICATION OF ELEMENTS THE PERIODIC TABLE-EXERCISE
  1. Elements belonging to the same period have

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  2. The scientist who made maximum contribution towards periodic table was

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  3. Which of the following sets of atomic numbers corresponds to the atomi...

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  4. Atomic numbers of last elements of 'd' block and p block of incomplete...

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  5. The outermost shell of a representative element contains x electrons a...

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  6. Which of the following statements about the modern periodic table are ...

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  7. Choose the right properties of periodic table. (a) Atomic radius incr...

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  8. Which of the following species does have electrons equal to 18 ? (a) K...

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  9. Pick out the correct statements about chlorine atom. (a) Chlroine is ...

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  10. What are the elements that belonged to 18th (or) '0' group ? (a) Heliu...

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  11. Electronic configuration from ns^2 np^1 to np^2 np^6 are called

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  12. 1 pm = …………..

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  13. block elements are called as lanthanides and actinides in modern perio...

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  14. "The law states hat the physical and chemical properties of the ...

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  15. VI A group elements are called chalcogens. This is because

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  16. The general electronic configuration of d-block elements is

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  17. The size of anion is more than neutral atom. This is due to

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  18. Which of the following is correct with respect to size ?

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  19. M^+ + IE2 =M^(+2)(g)+e^- This represents

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  20. In a period, I.E increases due to

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