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Standard XII
Chemistry
Diagonal Relationship
Why do the ra...
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Why do the radioactive elements emit radiations,that is the rays??
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Q.
Regarding the assertion and reason, choose the correct option.
Assertion [A]: Radioactive elements emit different types of radiations spontaneously.
Reason [R]:
Radioactive elements are unstable and undergo radioactive decay, emitting radiations in the process.
Q.
Why do we usually use isotopes emitting gamma radiations as radioactive tracers in medical science?
Q.
γ
-rays are harmful radiations emitted by natural radioactive substances.
(a) Which are other radiations emitted from such substances.
(b) What is the unit of nuclear radiation?
Q.
A radioactive source emits three types of radiations.
From which part of the atom do these radiations come ?
Q.
Cosmic rays, solar radiation, naturally occurring radioactive elements are all sources of .............
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