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Teachers have been getting a right kicking recently and it's not fair. So, let's hear it for the teachers who've inspired you, made you laugh, or helped you to make massive explosions in the chemistry lab. (Thanks to Godwin's Lawyer for the suggestion)
( , Thu 17 Mar 2011, 11:18)
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The metal is not as useful as its rather less dangerous salts.
And as for radiation, the major isotope (133Cs) is not radioactive. The main radioactive isotope (137Cs) is only found in nuclear waste.
( , Mon 21 Mar 2011, 20:19, 2 replies)
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( , Mon 21 Mar 2011, 20:26, closed)
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I never delved that far into it. So far as I think, if an element's name ends in "-um" then its radioactive, i.e. polonium, radium, uranium etc.
Well, apart from aluminium. I'm not that daft.
( , Mon 21 Mar 2011, 22:15, closed)
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( , Mon 21 Mar 2011, 22:20, closed)
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