When an experiment is repeated and the new results are different from the original results what may likely be inferred? A)
Additional test/trials are needed.

B)
Both results are wrong due to the discrepancy.

C)
The hypothesis is incorrect and must be modified.

D)
The first must be inaccurate because you are sure the second results
are correct.

i believe it is c.) 1575 j.

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

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.