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Alkali metals used in photoelectric cell...

Alkali metals used in photoelectric cells 

A

Na

B

Mg

C

Al

D

Cs

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. The radiation with highest wave number

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  2. Which of the following relates to photon both as wave motion and as a ...

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  3. Alkali metals used in photoelectric cells

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  4. The energy required to excite the electron from ground state of hydrog...

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  5. Kinetic energy of photoelectrons is independent on-------- of incident...

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  6. Assertain (A): K, Rb and Cs form superoxides. Reason (R) : The stabil...

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  7. If the wavelength of an electromagnetic radiation is 2000 A. what is i...

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  8. The energy of a photon is 3 xx10^(-12)erg.What is its wavelength in nm...

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  9. The frequency associated with photon of radiation having a wavelength ...

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  10. The wave number of the radiation whose quantum is 1 erg is

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  11. A sound wave is sent into a gas pipe . Does its internal energy change...

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  12. A wave has a frequency of 3 xx 10^(15) sec^(-1). The energy of that ph...

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  13. Calculate wave number

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  14. The energy of an electromagnetic radiation is 19.875 xx 10^(-13) ergs....

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  15. According to the Moseley's law, the frequency of a spectral line in X-...

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  16. Antibiotic obtained from lichens is

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  17. The Lyman series of hydrogen spectrum lies in the ultraviolet region. ...

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  18. (A) Hydrogen atom consists of only one electron but its emission spect...

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  19. Whwn the electron in an excited hydrogen atom jumps from an energy lev...

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  20. When the electron in hydrogen atom jumps from the second orbit to the...

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