Comments on: molybdenum_99(mo-90)has a half life of 66 hours? http://molybdenuminfo.com/2008/09/13/molybdenum_99mo-90has-a-half-life-of-66-hours/ Answering your molybdenum questions Thu, 09 Sep 2010 03:10:03 +0000 http://wordpress.org/?v=2.6.3 By: P Town http://molybdenuminfo.com/2008/09/13/molybdenum_99mo-90has-a-half-life-of-66-hours/#comment-65 P Town Mon, 15 Sep 2008 18:17:29 +0000 http://molybdenuminfo.com/?p=78#comment-65 The answer is C: 2.5 ci. After 66 hours, the 10 ci sample would halve, becoming 5 ci. After another 66 hours (totaling 132 hours) the sample would halve again and become 2.5 ci. The answer is C: 2.5 ci. After 66 hours, the 10 ci sample would halve, becoming 5 ci. After another 66 hours (totaling 132 hours) the sample would halve again and become 2.5 ci.

]]> By: John http://molybdenuminfo.com/2008/09/13/molybdenum_99mo-90has-a-half-life-of-66-hours/#comment-64 John Mon, 15 Sep 2008 13:08:01 +0000 http://molybdenuminfo.com/?p=78#comment-64 132 hours is two groups of 66 hours, which means that two half-lives have passed. That means a quarter of the same remains. A quarter of 10 ci is 2.5 ci. Answer choice C. -John 132 hours is two groups of 66 hours, which means that two half-lives have passed. That means a quarter of the same remains. A quarter of 10 ci is 2.5 ci.

Answer choice C.

-John

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