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प्रश्न
Represent the change in the nucleus of a radioactive element when a β particle is emitted.
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उत्तर
In an unstable nucleus, the neutron is changed into a proton by emitting a beta particle. This is represented as:
\[\ce{\underset{(neutron)}{^1_0n} -> \underset{(proton)}{^1_1P} + \underset{(β-particle)}{^0_{-1}e}}\]
संबंधित प्रश्न
Under which conditions does the nucleus of an atom tend to radioactive?
What are isobars?
Give one example of isobars.
An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?
State the penetrating range of α, β and γ radiations.
Define the term radioactivity.
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
State one use of radio-isotopes.
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 ______.
