The only part of Earth's inner structure that is a liquid is the . A. inner core B. lower mantle C. outer core D. crust

C. Outer Core

Explanation:

the Outer core and lower mantle are the only liquid parts of earths layers.

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