If, when electrolyzing water (2H2O --> 2H2 + O2), the total bond energy of 2 points the reactants is 2000kJ and the total bond energy of the products is 934kJ, what is the total energy of the reaction and is this an endothermic or exothermic reaction? *

1066kJ, exothermic
-1066kJ, exothermic
-1066kJ, endothermic
1066kJ, endothermic

може ли да зареждате повече информация, моля

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.