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संबंधित प्रश्न
When does the nucleus of an atom tend to become radioactive?
Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
An element `""_ZS^A` decays to `""_85R^222` after emitting 2 α particles and 1 β particle.
Find the atomic number and atomic mass of the element S.
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
State two characteristics of the substance used as thermionic emitter.
Heavy radioactive elements eventually turn into ______.
A radioactive material decays by simultaneous emissions of two particles with half-lives of 1400 years and 700 years respectively. What will be the time after which one-third of the material remains? (Take In3 = 1.1)
The count rate of activity of a radioactive sample of a very large population decreased from 1024 to 128 in 3 minutes. Then the rate of disintegration at the end of 5 minutes is ______.
Complete the following radioactive reaction:
\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
Assertion (A): Hydrogen atom consists of only one electron but its emission spectrum has may lines.
Reason (R): Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
