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    Flengo Jr.'s Avatar
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    Hallf Life Problems + More

    Homework Help plox

    Section II - For each pair, write of they are isotopes of the same element or two differen't Elements. Nuclear Notation form please

    1.) Element Q has 6 Protons and 7 neutrons
    Element R has 7 protons and 7 neturons

    2.) Element T has an atomic number of 20 and an atomic mass of 40
    Element Z has an atomic number of 20 and an atomic mass of 41

    3.) Element P has an atomic number of 92 and an atomic mass of 238
    Element S Has 92 Protons and 143 Neutrons

    Half - Life Problems

    Section III

    1.) The half-life of the fictional isotope Quantium-47 is 1,000 years. If a fox bone started out with 8,000 grams of Quantium-47, how many grams of Quantium-47 would be remaining after 5,000 years?

    2.) A 100 gram sample of Iodine-131 is observed for 16 days and is found to have 25% of it's original Iodine-131 remaining. What is the half-life of Iodine - 131



    Please Help i would appreciate it
    Last edited by Flengo Jr.; 11-15-2012 at 04:07 PM.


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    Ixxz's Avatar
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    I hope I wasn't too late. @APEsmoker

    "El primer deber de un hombre es pensar por sí mismo." - José Martí

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    Flengo Jr. (11-15-2012)

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    Flengo Jr.'s Avatar
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    Quote Originally Posted by Ixxz View Post
    I hope I wasn't too late. @APEsmoker

    Thanks Man You saved me literately two hours of having to stay after class. +Rep + Thanks

    ---------- Post added at 05:07 PM ---------- Previous post was at 05:00 PM ----------

    @Liz @Hero

    Or who is Moderator of this section this thread is Solved Thanks


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