Find the atomic number and the mass number, Physics

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Q. The radioactive isotope 84Pa214 undergoes a successive disintegration of two α decays and two β decays. Find the atomic number and the mass number of the resulting isotope.

For two α decays:

84Pa21482 A 21080 B 206

For two β decays :

80 B 20681 C 206 82 D 206

The resulting isotope is direct with mass number 206 and atomic number 82


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