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Author Question: Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239Np to decay ... (Read 90 times)

AEWBW

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on: Nov 18, 2019

Question 1

Which nuclide below is most likely to decay by electron capture?
◦ Re
◦ Re
◦ Re
◦ Re

Question 2

Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239Np to decay to 0.100% of its original quantity?
◦ 0.0427 days
◦ 2.04 days
◦ 23.4 days
◦ 1.491 days
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Marked as best answer by AEWBW on Nov 18, 2019

johnpizzaz

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Reply #1 on: Nov 18, 2019
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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AEWBW

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Reply 2 on: Nov 18, 2019
Excellent

FergA

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Reply 3 on: Yesterday
Wow, this really help

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