Advertisements
Advertisements
प्रश्न
When does the nucleus of an atom tend to become radioactive?
Advertisements
उत्तर
When the number of neutrons exceeds much than the number of protons in a nuclei, it become unstable or radioactive.
APPEARS IN
संबंधित प्रश्न
How can they be made to leave the metal surface? (State any two ways)
State the energy conversion taking place in a cathode ray tube
Give the relative ionizing power of α, β and γ radiations.
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
A radioactive nuclide `""_86^226` Ra decays by emission of two alpha particles, one beta particle and gamma rays. Which of the following is the resulting nuclide X?
An element P disintegrates by α - -emission and the new element suffers two further disintegrations, both by β -emission, to form an element Q. Explain the fact that P and Q are the isotopes.
How is a cathode ray beam affected while passing through an electric field?
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
Assertion (A): The force of repulsion between atomic nucleus and α-particle varies with distance according to inverse square law.
Reason (R): Rutherford did α-particles scattering experiment.
