Cho 3,04 gam hỗn hợp A gồm bột Fe3O4 và FeO vào dung dịch H, SO4 đặc, nóng dư. Sau khi phản ứng xảy ra hoàn toàn thu được 0,224L khí SO2 (đktc). Tính khối lượng mỗi chất trong

2b2t

explanation:

2b2t

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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.