Graphite is an electric conductor, consequently, useful in such applications as arc lamp electrodes. It can conduct electricity due to the vast electron delocalization within the carbon layers (a phenomenon called aromaticity). These valence electrons are free to move, so are able to conduct electricity.
5,000. What’s more is that the 5,000 friend limit is not just for friends – it’s for connections in general. Every person can have a maximum of 5,000 connections on Facebook, which include both friends and Pages. You will not be able to accept incoming friend requests or like any more Pages if you get to that number.