A chemical reaction goes twice as fast if the temperature is increased by 10oC. At 5oC, milk undergoes a chemical reaction that makes it go sour in 8 days. Calculate how long it will take milk to go sour at 35oC.

im pretty sure its b

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.