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Half-life

2 PYQ across 1 exam · 1994–2001 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

19941 PYQ
CSEQ25
The half-life of a radio active element is 5 years. The fraction of the radioactive substance that remains after 20 years…
20011 PYQ
CSEQ24
A radioactive substance has a half-life of four Months. Three fourth of the substance would decay in…
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Radioactive decay
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