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Balance a radioactive decay equation to find the charge and nucleons.

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In the equation 226/88 Ra--> 4/2 He+ ------, the characteristics of the missing particle are:

A) charge, 90; nucleons, 230

B) charge, 86; nucleons, 230

C) charge, 90; nucleons, 222

D) charge, 86; nucleons, 222

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226/88 Ra is the particle on the left of the reaction.
It has an atomic number (number of protons) of 88.
It has a mass number, or total number of nucleons (protons and neutrons) of 226.

Since the reaction starts with an atom which is above 100, this is a radioactive decay process.
Since one of the ...

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