226Ra is an isotope in the decay series of 238U first recognized as a new elemen
ID: 1504887 • Letter: 2
Question
226Ra is an isotope in the decay series of 238U first recognized as a new element by the Curies. It poses special problems because its daughter is a radioactive noble gas. World War II aircraft had instruments with glowing radium painted dials. Find the radius of a 226Ra nucleus. fm226Ra is an isotope in the decay series of 238U first recognized as a new element by the Curies. It poses special problems because its daughter is a radioactive noble gas. World War II aircraft had instruments with glowing radium painted dials. Find the radius of a 226Ra nucleus.
_____fm
Explanation / Answer
mass number of 226Ra, A = 226
radius of nucleus, R = Ro*A^(1/3)
= 1.2fm*226^(1/3)
= 7.31 fm
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