EARTH SCIENCE
'(<a href="http://www.j-archive.com/media/2010-03-22_DJ_18.jpg" target="_blank">Jimmy of the Clue Crew shows an atomic diagram on the monitor.</a>)  Used to date artifacts because it has a half-life of 5,730 years, <a href="http://www.j-archive.com/media/2010-03-22_DJ_18a.jpg" target="_blank">this</a> isotope has 6 protons and 8 neutrons in its nucleus'
carbon-14