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chemistry

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When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced.
Express your answer as a nuclear equation.

  • chemistry - ,

    number preceding symbol = atomic number(a subscript)
    number after symbol = mass number(a superscript)
    In nuclear equations the subscripts add up and the superscripts add up.

    98Cf249 + 8O18 ==> nXm + on1 + on1 + on1 + on1.

    So your job is to determine n, X, and m.
    Remember the numbers must add up on both sides to the same thing.
    For preceding number (the subscripts).
    98 + 8 = n + 0 + 0 + 0 + 0 so n = 106
    For number after the symbol (superscripts)
    249 + 18 = m + 1 +1 +1 +1
    m = 249 + 18 - 4 = 263
    Now look on the periodic table and identify element X, element # 106. That's Sg. So the equation, in full, is
    98Cf249 + 8O18 ==> 106Sg263 + 4 on1.

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