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Law of Radioactivity

5 Half life f...

Question

5 Half life for radioactive 14c is 5760 years . ln how many years 200mg of 14c will be reduce to 25mg??

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Q. The half life of

C^{14}

5760

200

C^{14}

, the time taken to change to

25

mg is __________ .

Q. C - 14 has a half life of 5760 years. 100 mg of sample containing C - 14 is reduced to 25 mg in :

^{14} C

has a half life of

5760

100

m g

of the sample containing

^{14} C

25

m g

Q. A radioactive substance has half-life

5760 y r s

100 m g

containing substance is reduced to

25 m g

Q. The half-life of

^{14} C

is 5570 yr. How many years will it take 90% of a sample to decompose?

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