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NONREV | 12:21 Sun 01st Feb 2009 | Crosswords
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A nucleus havingt the same atomic number and mass as another, but a different energy state NONREV
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23d Isomer
isomer
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Thank you Lie- in King and littlegem,I had to dash away after posting question and help to prepare lunch as we have visitors [family].I hear a cry of help so I'm off again, hope to get back this evening

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