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The number of elements which can be acco...

The number of elements which can be accommodated in the present set-up of the long from of the periodic table is :

A

120

B

118

C

122

D

124

Text Solution

Verified by Experts

The correct Answer is:
B
In the present set-up, on the basis of Aufbau principle and four blocks of elements, the last period, i.e., 7th period can accommodate 32 elements `(7s^(2), 5f^(14) , 6d^(10) , 7p^(6) )` . Thus, total elements that can be accommodated are 118 (86 upto 6th period plus 32 in the 7th period).
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Which of the elements whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the periodic table?

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VMC MODULES ENGLISH-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -LEVEL -1
  1. Which of the following transitions involves maximum amount of energy?

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  2. IE(1) and IE(2) of Mg are 178 and 348 kcal mol^(-1). The energy requir...

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  3. The IP(1),IP(2),IP(3),IP(4) and IP(5) of an element are 7.1, 14.3, 34....

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  4. Correct order of electronegativity of N,P,C and Si on Pauling scale is...

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  5. Which of the following have maximum electron affinity?

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  6. The electronic configuration: 1s^(2),2s^(2)2p^(6),3s^(2)3p^(6),3d^(1...

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  7. EN of the element (A) is E(1) and IP is E(2). Then EA will be

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  8. The element with atomic number 57 belongs to:

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  9. The most metallic of the following elements is:

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  10. Which set is expected to show the smallest difference in IE(1) ?

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  11. Successive ionisation energy of an atom is greater than previous one, ...

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  12. What is the order of ionisation energies of the coinage metal

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  13. On moving from Li to F in the second period, there would be a decrease...

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  14. Which of the following has the maximum value of electronegativity?

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  15. Which of the following element has the maximum electron affinity ?

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  16. A change of Zn to Zn^(2+) is a accompanied by a decrease in:

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  17. The electronic configuration of some elements are given below: (i) 1...

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  18. Elements with their electronic configurations are given below: Answer ...

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  19. Elements with their electronic configurations are given below: Answer ...

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  20. The number of elements which can be accommodated in the present set-up...

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