Starting material A with the following signals in 1H NMR spectrum: 1.5 (d, 3H), 3.5 (septet, 0.5H) was reacted with magnesium in diethyl ether to produce compound B which was immediately reacted with benzaldehyde in diethyl ether followed by dilute HCl to produce product C as a racemic mixture. What is the most likely 1H NMR description for the product C

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

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