Mercury - Is it a core?

Apparently Mercury is so dense...it is believed to be 2/3 iron.
1. Is there any evidence to suggest that Mercury might not have started out
in its present location? (e.g. nature of orbit)
2. Now for the dumb question: Is there a link between Mercury and the
Asteroid belt?
3. What do u feel about a chocolate bar called Mercury? - Curry flavoured
one end and RADOX BLUE on the other.