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The ratio of the radii of the first thre...

The ratio of the radii of the first three orbits in an atom of hydrogen is

A

`1:4:9`

B

`9:4:1`

C

`1:2:3`

D

`3:2:1`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-ATOMIC STRUCTURE-OBJECTIVE EXERCISE - 2
  1. Which one of the following statements is not correct?

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  2. The ratio of radii of first orbits of H, He^(+) and Li^(2+) is

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  3. The ratio of the radii of the first three orbits in an atom of hydroge...

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  4. The radius of hydrogen atom in the ground state is 0.53 Å, the radius ...

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  5. In hydrogen atom the kinetic energy of electron is 3.4 eV. The distanc...

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  6. The radius of first Bohr's orbit for hydrogen is 0.53Å. The radius of ...

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  7. The energy of second Bohr orbit of hydrogen atom is -328 kJ. mol^(-1),...

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  8. Which of the following transistions in hydrogen atom will require the ...

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  9. The energy of an electron in the first Bohr's orbit of a hydrogen atom...

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  10. The total energy of electron in an atom is a combination of potential ...

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  11. The radius of which of the following orbit is same as that of the firs...

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  12. The change in velocity when electron jumps from the first orbit to the...

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  13. As an electron is brought from an infinite distance close to nucleus o...

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  14. In Bohr series of lines of hydrogen spectrum, the third line from the ...

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  15. The Ionisation potential of Hydrogen is 2.17 xx10^(-1) erg/atom. The e...

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  16. Kinetic energy of electron in a mono electronic species is +1313 lJ/mo...

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  17. Ionisation energy of He^(+) is 19.6 xx 10^(-18)"J atom"^(-1) The energ...

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  18. The wavelength of radiation required to remove the electron of hydroge...

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  19. The velocity of electron in hydrogen atom is 7.29 xx 10cm/sec. The pot...

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  20. In an atom two electrons move around the nucleus in circular orbits of...

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