Which resources are significantly polluted by heavy metals like mercury?
a. soil
b. water
c. neither a nor b
d. both a and b

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer