A team of engineers is doing a cost-benefit analysis to determine whether they should develop new technology. What are two benefits associated with
company profits they should include in their analysis?
A. Increased business opportunities
B. Preservation of habitat
C. Decrease in human diseases
D. Longer work hours
E. More efficient production

the answer is na (sodium)

explanation:

0.07 g/cm³

1.37 g/cm³

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.