Which statement best completes the diagram? Cause Effect The U. S. Constitution establishes federalism. ? O A. State governments are given the power to set up all courts. O B. State governments give up the power to collect taxes. O C. The federal government gains the right to remove state lenders. O D. The federal government cannot interfere with some state actions.

answer; i believe that the correct answer is (a) potassium(k)

c

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.