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Which pair of atomic numbers represents ...

Which pair of atomic numbers represents s-block elements?

A

7,15

B

6, 12

C

9,17

D

3, 12

Text Solution

Verified by Experts

The correct Answer is:
D
The elements with atomic number 3 and 12 belongs to s-block..
`Z=3: 1s^2 2s^1`
`Z = 12 : 1s^2 2s^2 2p^6 3s^2`
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BRILLIANT PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-QUESTIONS (LEVEL-I)
  1. Which pair of atomic numbers represents s-block elements?

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  2. The atomic radius increases as we move down a group because

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  3. Which one of the following ions has the smallest radius?

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  4. Consider the ions: 'K^+, S^(2-), Cl^-' and 'Ca^(2+) .' The radii of th...

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  5. The radius of Cr is minimum in which of the following compounds?

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  6. The set representing the correct order of first ionization potential i...

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  7. Which of the following has least electron affinity?

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  8. Which of the following statements is correct with respect to the prope...

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  9. The element with the electronic configurations as (Ar) 3d^(10)4s^(2)4p...

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  10. The law of triads is not applicable with

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  11. If Aufbau rule is not followed, K-19 will be placed in........... bloc...

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  12. Following triads have approximately equal size

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  13. Which pair is different from the others?

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  14. Which is/are amphoteric oxides?

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  15. Second electron affinity of an element

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  16. Ionisation energy of F^Ɵ is 320 kJ mol^(-1) . The electron gain enthal...

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  17. Which of the following element has the highest EN?

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  18. Which of the following oxides is most basic?

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  19. The IUPAC name for the element with atomic number, Z=119 is.

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  20. An element which lies in the same group of the periodic table as mercu...

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