Acuvetime re50which describes a scientist being creative? joshua takes detailed notes about the experiment he is conducting. elyse reads the references of a study before believing it.• sara tries turning a test tube upside down to collect a gas. o levi asks if redwoods would grow even taller if they had more phosphorus, mark this and returnsave and exitnext

answer; i do believe the correct answer is (river); /// good luck

answer///carbon;

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.