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which must represent an atom in an excit...

which must represent an atom in an excited state?

A

`1s^(2),2s^(2)2p^(1)`

B

`1s^(2),2s^(2)2p^(2)`

C

`1s^(2),2s^(2)2p^(2),3s^(1)`

D

`1s^(2),2s^(2)2p^(5)`

Text Solution

Verified by Experts

The correct Answer is:
C
`1s^(2),2s^(2)2p^(2),3s^(1)` (Excited state)
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VK JAISWAL-PERIODIC PROPERTIES-Level 1
  1. Which property decreases from left to right across the periodic table ...

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  2. Consider the following information about element P and Q: {:(,"Perio...

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  3. which must represent an atom in an excited state?

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  4. Which of the following anion has the smallest radius?

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  5. The ionic radii of Li^(+), Be^(2+) and B^(3+) follow the order:

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  6. Largest in size out of Na^(+),Ne and F^(-) is:

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  7. Which of the following atom or ions has the smallest size?

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  8. The single covalent radius of P is 0.11 nm. The single covalent radius...

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  9. Which of the following is arranged in decreasing order of size?

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  10. The correct order of increasing atomic radius of the following element...

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  11. The correct order of increasing radii of the elementsSi,Al,Na and P is

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  12. The size of the species, Pb,Pb^(2+), Pb^(4+) decreases as -

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  13. Incorrect order of radius is:

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  14. The correct order of atomic/ionic radiii is:

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  15. The radius of which is closest to that of the Li^(+) ions?

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  16. The first, second and third ionization energies (E(1),E(2)&E(3)) for a...

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  17. Element having highest I.P. value is:

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  18. The order of ionisation potential between He^(+) io and H-atom (both s...

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  19. Which of the following metal is expected to have the highest third ion...

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  20. Second ionisation potential of Li,Be,B is in the order:

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