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Physics 18 Online
OpenStudy (anonymous):

After undergoing alpha decay, an atom of radium-226 becomes a. thorium-234 c. uranium-238 b. radon-222 d. radium-224 Can someone give me an walk through

OpenStudy (isaiah.feynman):

Alpha decay is an emission of a helium nucleus. So, that means an emission of 2 protons and 2 neutrons.

OpenStudy (shamim):

Mass number of radium=226 Right?

OpenStudy (shamim):

Anyway mass number=proton number+neutron number

OpenStudy (shamim):

So 226-4=?

OpenStudy (shamim):

U know mass of an alpha particle is = 2 proton +2 neutrons=4 Right?

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