Which of the following statements is true?
a. processes are spontaneous because they occur at an observable rate.
b. spontaneity can depend on the temperature.
c. processes that are spontaneous in one direction are spontaneous in the opposite direction.
d. all of the statements are true.

1. they vary with a higher number because boiling is way hotter than melting

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

it takes on an electronical energy