Family 1 | Family 2 | Family 3
Particle | Mass | Particle | Mass | Particle | Mass
Electron | .00054 | Muon | .11 | Tau | 1.9
Electron-neutrino | < 10-8 | Muon-neutrino | < .0003 | Tau-neutrino | < .033
Up-quark | .0047 | Charm Quark | 1.6 | Top Quark | 189
Down-quark | .0074 | Strange Quark | .16 | Bottom Quark | 5.2

Table 1.1 The three families of fundamental particles and their masses (in multiples of the proton mass). The values of the neutrino masses have so far eluded experimental determination.