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प्रश्न
Why should a radioactive substance not be touched by hands?
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उत्तर
Radioactive substance should not be touched by hands because these radiations are harmful; when radiation falls on the human body, they kill the human living tissues and cause radiation burns.
संबंधित प्रश्न
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.
Write one use of cathode ray tube.
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
Define free electrons.
How is a cathode ray beam affected while passing through an electric field?
In a cathode ray tube state the purpose of the fluorescent screen.
Name a common device where a hot cathode ray tube is used.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
From α, β and γ-rays, name the one which is not affected by electric or magnetic field?
Heavy radioactive elements eventually turn into ______.
