Class 10 FRANK Solutions Physics Chapter 6.1: Radioactivity
Revise Physics topics with Frank Solutions for ICSE Class 10 Physics Chapter 6.1 Radioactivity. Understand the meaning of terms such as atomic mass, atomic number, mass number, nucleus etc. Practise TopperLearning’s Physics solutions to find out why radioactivity is considered a nuclear phenomenon.
In addition, learn about alpha particles, beta particles and gamma radiations with our ICSE Class 10 Physics chapter resources. Scoring high marks in Physics will need you to have clarity of concepts. For strengthening conceptual clarity, you should use our practice tests and video lessons.
Radioactivity Exercise 261
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(ii) Mass number is the sum of protons and neutrons present in the nucleus.
(iii) Atomic mass of element is the relative mass of its atom as compared to the mass of carbon atom taken as 12.
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Similarities:
Both ?-radiations and X-rays affect photographic plate, both travel with the speed of light.
Dissimilarities:
?-radiations are obtained in emissions from the radioactive substances due to energy change in the nucleus of their atoms and X- rays are obtained when highly energetic cathode rays are stopped by a heavy metal target of high melting point.
?-radiations have high penetration power but X-rays do not have have very high penetration power.
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(i) Alpha particles are heavy in mass and are positively charged so they are deflected less by magnetic field and direction is upward which can be calculated by Fleming left hand rule.
(ii) Beta particles are negligible in mass so they are highly deflected by magnetic field and they are negatively charge particle so they are deflected in downward direction.
(iii) Gamma radiations have no mass and no charge so they are not deflected by magnetic field.
Radioactivity Exercise 262
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Radioisotopes can be used as:
(i) Rays from Radium produce satisfactorily improvement in skin diseases.
(ii) Radioactive Sulphur S35 helps to study advantages and disadvantages of fungicides.
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(i) The sources should only be handled by the forceps provided and never touched by hand.
(ii) They should never be pointed towards a person.
(iii) Food should not be taken where the sources are being used, as it may be contaminated.
(iv) Never smoke near a radioactive source.