2 A large crystal of potassium manganate(VII was placed in the bottom of a beaker of cold
sas
Temperatu
and left for several hours.
cold water
b
crystal of potassium manganatevi
a
a Describe what would be seen:
6 US
i after five minutes ii after several hours
bExplain your answers using the idea of parti
Name the two processes that took place dun b
the experiment.

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.

4d^55s^1 ( third choice)