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Author Question: A certain radioactive isotope has a half-life of 14 years. If 19 grams of the isotope are left after ... (Read 178 times)

abern

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on: May 26, 2021

Question 1

A certain radioactive isotope decays from 70 grams to 45 grams in 27 years. What is the half-life of the isotope?
◦ 36.25 years
◦ 48.31 years
◦ 50.02 years
◦ 40.16 years
◦ 42.36 years

Question 2

A certain radioactive isotope has a half-life of 14 years. If 19 grams of the isotope are left after 5 years, how much was present at the beginning?
◦ 24.34 grams
◦ 26.55 grams
◦ 27.21 grams
◦ 34.75 grams
◦ 22.10 grams
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Marked as best answer by abern on May 26, 2021

randomguy133

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Reply #1 on: May 26, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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abern

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Reply 2 on: May 26, 2021
Gracias!

Alyson.hiatt@yahoo.com

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Reply 3 on: Yesterday
Excellent

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