Tuesday
March 31, 2015

Homework Help: Gen Chem

Posted by Sarah H on Friday, March 28, 2008 at 5:34pm.

Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239-Np to decay to 1.00% of its original quantity?

I got: close to 15 days. Is this right?
I figured that about 1% of the original quantity would be roughly 6.5 Half lives, and since a half life is 2.35 days, 6.58*2.35

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

UIW - Neptunium-239 has a half-life of 2.35 days. How many days must elapse for ...
Algebra - Two different radioactive isotopes decay to 10% of their respective ...
CHEM - Pu-239 has a half-life of 24110 y. If 1.00 kg of this isotope is present ...
Math with science - Radioactive iodine treatment is so successful at treating ...
chemistry - The disintegration of a radioisotope, such as I-131 to Xe-131, is ...
CHEMISTRY - Suppose you had a detection device that could count every decay ...
Math - _The_Natural_Base_e_ An accident in 1986 at the Chernobyl nuculear plant ...
calc - The half-life of polonium is 139 days, but your sample will not be useful...
Chemistry - A radioactive element has a half-life of 6.41 days. What percent of ...
chemistry - The half-life for the radioactive decay of calcium-47 is 4.5 days.If...

Members