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News and Discussions => History & Trivia => Topic started by: Marlin on Jan 15, 2016, 12:02

Title: What Ten Radioactive Elements Have the Longest Half-Lives?
Post by: Marlin on Jan 15, 2016, 12:02

What Ten Radioactive Elements Have the Longest Half-Lives?

http://www.realclearscience.com/articles/2016/01/14/quizzes_what_ten_radioactive_elements_have_the_longest_half-lives.html

Title: Re: What Ten Radioactive Elements Have the Longest Half-Lives?
Post by: GLW on Jan 15, 2016, 01:43

there has never been a good mnemonic for this one,.... :-\

Title: Re: What Ten Radioactive Elements Have the Longest Half-Lives?
Post by: Mike McFarlin on Jan 15, 2016, 06:32

Bismuth, Radium, Thorium, Protactinium, Curium, Plutonium, Uranium, Neptunium, Americium, Technicium

Title: Re: What Ten Radioactive Elements Have the Longest Half-Lives?
Post by: OldHP on Jan 16, 2016, 02:42

Folks tend to forget about Bismuth, Protactinium, and Neptunium unless they have them in large supply, or they cause a problem at their location!  But, too bad

Quote from: GLW on Jan 15, 2016, 01:43

there has never been a good mnemonic for this one,.... :-\

if there were, every one in the business could answer without going looking!   [SadPanda]  [2cents] :old: [coffee] (beer not coffee)!

Title: Re: What Ten Radioactive Elements Have the Longest Half-Lives?
Post by: Rennhack on Jan 16, 2016, 06:09

Quote from: OldHP on Jan 16, 2016, 02:42

[coffee] (beer not coffee)!

There is an emoji for that... [beer]

Title: Re: What Ten Radioactive Elements Have the Longest Half-Lives?
Post by: SloGlo on Jan 18, 2016, 10:51

Quote from: Mike McFarlin on Jan 15, 2016, 06:32

Bismuth, Radium, Thorium, Protactinium, Curium, Plutonium, Uranium, Neptunium, Americium, Technicium

eye wood add tellerium-128,barium-130,
germanium-76,
xenon-136, and  tellerium-130.
it's knot rock it science.