Someone tried hacking into my Facebook can i trace it?

[Your Uncle Dodge!]

1. No one will ever be arrested for this as no crime was committed.
2. It's not "hacking" just to put a name and password into a log-in screen. Even a 2-year-old can do that.
3. To know whom it was, you'd have to have the IP address of the computer that tried, then figure out who had access to it. My guess is you cannot do this.