Year Which conclusion is supported by the data?
A. Climate change is caused by extreme weather events.
B. One change to Earth's surface has little influence on Earth's
weather systems.
C. One change to Earth's surface can result in changes to other Earth
systems.
D. Climate change is likely to reduce extreme weather events.
SUBART

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.