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प्रश्न
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
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उत्तर
Radium is a radioactive substance. It gives out radioactive radiations which show fluorescence in zinc sulphide. Zinc sulphide is a fluorescent material, so it glows in dark.
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संबंधित प्रश्न
When is said to be the nucleus unstable?
State the penetrating range of α, β and γ radiations.
A certain nucleus A (mass number 238 and atomic number 92) is radioactive and becomes a nucleus B (mass number 234 and atomic number 90) by the loss of one particle.
What particle was emitted?
Why are materials of low work function preferred as thermionic cathode materials?
Are all the radiations viz. α, β and γ emitted in a single radioactive decay?
Which of the following statements is/are correct?
- α particles are photons
- Penetrating power of γ radiation is very low
- Ionization power is maximum for α rays
- Penetrating power of γ radiation is very high
Heavy radioactive elements eventually turn into ______.
A radioactive nucleus \[\ce{^A_ZX}\] undergoes spontaneous decay in the sequence \[\ce{^A_ZX -> _{Z-1 }B -> _{Z-3}C -> _{Z-2}D }\], where Z is the atomic number of element X. The possible decay particles in the sequence are ______.
