Dts. One mole of ethanol C H O is oxidized by potassium permanganate solution which
is acidified with sulphuric acid, forming ethanoic acid C, H,O,, if the percentage of
the actual yield is 60%, so what is the mass of ethanoic acid which can be actually
collected from the oxidation of 2.3 g of ethanol ?
a)1.32g
b)1.38g
c)1.8g
d)3g​

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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.