The graph shows the energy change that occurs during a chemical reaction. Graph 1
Energy
Reaction Progress
What conclusion can be reached based upon the graph?
Select one:
O The energy of the products is less than the energy of the reactants.
The energy of the reactants is less than the energy of the products.
O Energy was neither absorbed nor released during this reaction.
The energy of the products and the energy of the reactants are equal.

it is the most commonly accepted one

c. electrical charges of ionic bonds.

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.