1000 to the power 4 not so good at math but
it was earnest rutherford he did the gold foil experiment where he shot alpha particles at gold foil that was supposed to be about 1 atom thick. He expected all the atoms to pass straight through but some bounced back, so he proposed that there was something small dense and positive in atoms aka the nucleus
Copper is sought because it is a very useful metal used for conducting heat and electricity, its made of one pure element called copper (not surprisingly) and is slightly uncommon. Making its demand higher.
