What would happen if you put a balloon on earth And brought it to the moon with lower atmospheric pressure it would do what? 1: Expand
2: Shrink
3: Stay the same size with the same internal pressure
4: Stay the same size but with a different internal pressure

I think it's 1

Explanation:

As the balloon rises the gas inside the balloon expands because the pressure surounding the balloon drops.

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