Plutonium-238

Akasaka

Senior Member
Japanese
Hello members,

How do you read "Plutonium-238"? Two hundred thirty-eight? Two three eight? Two thirty-eight?

Thanks in advance.
 
  • entangledbank

    Senior Member
    English - South-East England
    Yes. Although I read this far more often than I hear anyone say it, I think it's always said as separate numbers two three eight. However, these are like bus numbers: it's only over a hundred that we change style. Carbon 12 is twelve, strontium 90 is ninety. A multiple of ten like 210 or 240 would be said two ten or two forty.
     

    kentix

    Senior Member
    English - U.S.
    I would say plutonium two thirty-eight. Maybe it's an American thing. The speaker in a video from the Nuclear Energy Institute in Washington, D.C. says it the same way. Uraninum two thirty-five. Uranium two thirty-eight.
     
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    Stoggler

    Senior Member
    UK English
    I would say plutonium two thirty-eight. Maybe it's an American thing. The speaker in a video from the Nuclear Energy Institute in Washington, D.C. says it the same way. Uraninum two thirty-five. Uranium two thirty-eight.
    I think you're right, although you might hear it said that way on this side of the Atlantic as well.

    So in summary, the numbers in this context could be said as either "two-three-eight" or as "two-thirty-eight". Both are correct, and both would be recognized in any English-speaking country, although the former is more British, and the latter is more of an American usage.
     
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    dojibear

    Senior Member
    English - Northeast US
    I speak AmE, and I say "two thirty-eight" (like #5) for atomic weights.

    That does not mean I say the number 238 like that in all situations.
     

    Packard

    Senior Member
    USA, English
    I would say plutonium two thirty-eight. Maybe it's an American thing. The speaker in a video from the Nuclear Energy Institute in Washington, D.C. says it the same way. Uraninum two thirty-five. Uranium two thirty-eight.
    I would say "two thirty-eight". Often with uranium it is U-two thirty-eight.

    Plutonium is "Pu", though I've never heard it called out by its symbol like uranium is. If it were it would be "pee-yu-238"


    Plutonium - World Nuclear Association

    Pu-238, (half-lifea 88 years,
     
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