A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by the reaction:

for which = -30.5 kJ/mol at 37.0 °C and pH 7.0.
Calculate the value of in a biological cell in which [ATP] = 5.0 mM, [ADP] = 0.80 mM, and = 5.0 mM.
A. What is the in kJ/mol?
B. Is the hydrolysis of ATP spontaneous under these conditions? Yes / No.

hey your not cool]      

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.