Suppose you have two small blocks that look the same (same size and shape) and you are told the density of one block is 11.3g/cm3 and the density of the other block is 0.50g/cm3. Describe an experiment (and the results) that will help you tell which is which only knowing only the densities Report inappropriate predictions

58750.08068 is the answer i think

it is stable as it is in group 0 which have full outer shells of electrons

12 is it do you think so

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.