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Author Question: After two half-lives, there is ________ percent of radioactive material remaining. (Read 40 times)

oliviahorn72

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on: Feb 28, 2020

Question 1

When a beta particle is emitted, the mass number of the isotope ________.
◦ goes down two
◦ goes up one
◦ goes down four
◦ remains unchanged

Question 2

After two half-lives, there is ________ percent of radioactive material remaining.
◦ 25
◦ 75
◦ 50
◦ 100
Earth Science ¦ Tarbuck, Lutgens, Tasa ¦ 15th Edition
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Marked as best answer by oliviahorn72 on Feb 28, 2020

cat123

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Reply #1 on: Feb 28, 2020
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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oliviahorn72

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Reply 2 on: Feb 28, 2020
Thanks for the timely response, appreciate it

xiazhe

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Reply 3 on: Yesterday
Wow, this really help

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