The terrestrial planet cores contain mostly metal because?

Question

radioactivity created metals in the core from the decay of uranium.

convection carried the metals to the core.

metals sank to the center during a time when the interiors were molten throughout.

metals condensed first in the solar nebula and the rocks then accreted around them.

the entire planets are made mostly of metal.

Answer 1

Yes to the above:)

It's called differentiation. (the whole process)

Answer 2

metals sank to the center during a time when the interiors were molten throughout