Question :
The half-life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half-life period of a radioactive substance is one month, then
1. it will completely disintegrate in two months
2. l/8th of it will remain intact at the end of four months
3. 3/4th of it will disintegrate in two months
4. it will completely disintegrate in four months
Answer :
1 - it will completely disintegrate in two months
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