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प्रश्न
What happens to the atomic number of element when (i) An α -particle, (ii) A β -particle 1 and (iii) γ-radiation is emitted?
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उत्तर
(i) α particle is represented by 2He4 this means it contains 2 protons so after emitting a α particle atomic number of element would decrease bv 2 unit.
(ii) β particle is represented by -1θ° after emitting a β particle atomic number of element would increase bv 1 unit.
(iii) Y radiations have no charge and no mass so after emitting a Y radiation atomic number of element remain unchanged.
संबंधित प्रश्न
Give the relative ionizing power of α, β and γ radiations.
A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y What will be the values of P and Q in terms of A and Z?
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Two radioactive nuclei are represented by xAp and yAq and when p and q are mass numbers and x, y are the atomic number. How can the products be represented, i .e., what are the new values of p, q. x and y after the emission of an α-particle and a β-particle from A and B respectively.
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
State three ways of obtaining an electron-beam.
Two radioactive sources A and B of half lives of 1 hour and 2 hours, respectively, initially contain the same number of radioactive atoms. At the end of two hours, their rates of disintegration are in the ratio of ______.
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.
