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If 50% of a radioactive element remains after 4000 years,

If 50% of a radioactive element remains after 4000 years, what is the half-life?a 2000 years b 4000 years c 8000 years d 12000
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If 70% of a radioactive element remains radioactive after 400 million years , then what percent remains radioactive after 600
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2. asked by Alexus
3. 1,200 views
if 60% of a radioactive element remains radioactive after 300 million years, then what percent remains radioactive after 500
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2. asked by Lexi
3. 2,361 views
If 50% of a radioactive element remains after 4000 years, what is the half-life? 1,2,3, or 4 half-life(s)
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2. 28 views
The half-life of a certain radioactive element is about1500 years. After 2800 years, what percentage P of a sample of this
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2. asked by Samantha
3. 2,508 views
If 60% of a radioactive element remains radioactive after 200 million years, then what percent remains radioactive after
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2. asked by aniyah
3. 539 views
If 80 percent of radioactive element is left after 250 years, then what percent remains after 600 years? What is the half life
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2. asked by Doug
3. 819 views
If the half life- period of a radioactive element is 1600.After how many years will if remains 25% of his quantity
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2. asked by Prince
3. 529 views
The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of the radioactive atoms in it
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2. asked by 66665445
3. 89 views
The half-life of a certain radioactive element is 800 years. How old is an object if only 12.5% of the radioactive atoms in it
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2. asked by JACK HAMMMMMMER
3. 201 views