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
there has never been a good mnemonic for this one,.... :-\
Bismuth, Radium, Thorium, Protactinium, Curium, Plutonium, Uranium, Neptunium, Americium, Technicium
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)!
Quote from: OldHP on Jan 16, 2016, 02:42
[coffee] (beer not coffee)!
There is an emoji for that... [beer]
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.