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How did heavy elements originate?
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Why do group 7 elements become less reactive as you go down the group?
Started by jaredBoard General Science |
Replies: 2 Views: 6962 |
12/02/2009 23:39:37 by Chemistry4me |
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can you write these elements up to down ..from more reactive to less reactive |
Replies: 2 Views: 4823 |
22/06/2014 16:33:38 by chiralSPO |
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Do heavy water reactors, like "CANDU", produce lots of Ce-137 and Sr-90? |
Replies: 2 Views: 5111 |
20/03/2011 17:11:09 by sanpaku |
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Where did the starter culture for yoghurt making originate?
Started by Barbara Board Cells, Microbes & Viruses |
Replies: 1 Views: 8120 |
07/01/2009 01:04:51 by RD |
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Where and when did all the different human ancestor species originate?
Started by thedocBoard Plant Sciences, Zoology & Evolution |
Replies: 2 Views: 4393 |
01/06/2010 23:55:27 by echochartruse |