Up, down, strange, charm, bottom, top
And with leptons and bosons unless... [DOC] [TLE] What is the difference between the up, down, strange, charmed, top ... [PAR] There are 6 quarks (and 6 anti-quarks) which are part of the Standard Model of 
Particle Physics .... How can up and down quarks be converted to top and bottom 
quarks?