From lightest to heaviest (approximately):
* Neutrino: The lightest known particle, with a mass so small it's still being measured.
* Electron: A fundamental particle with a mass of 9.10938356 × 10⁻³¹ kg.
* Muon: A heavier version of the electron with a mass of 1.88353159 × 10⁻²⁸ kg.
* Tau: The heaviest of the three leptons, with a mass of 3.16747 × 10⁻²⁷ kg.
* Up Quark: A fundamental particle that makes up protons and neutrons, with a mass of 2.3 MeV/c² (roughly 4.1 × 10⁻³⁰ kg).
* Down Quark: Another fundamental particle, also making up protons and neutrons, with a mass of 4.8 MeV/c² (roughly 8.5 × 10⁻³⁰ kg).
* Proton: A composite particle made of two up quarks and one down quark, with a mass of 1.6726219 × 10⁻²⁷ kg.
* Neutron: A composite particle made of one up quark and two down quarks, with a mass of 1.67492747 × 10⁻²⁷ kg.
* W boson: A fundamental particle mediating the weak force, with a mass of 80.379 GeV/c² (roughly 1.4 × 10⁻²⁵ kg).
* Z boson: Another fundamental particle mediating the weak force, with a mass of 91.1876 GeV/c² (roughly 1.6 × 10⁻²⁵ kg).
* Higgs boson: A fundamental particle responsible for giving mass to other particles, with a mass of 125.18 GeV/c² (roughly 2.2 × 10⁻²⁵ kg).
* Top Quark: A fundamental particle with the highest mass of all quarks, with a mass of 172.44 GeV/c² (roughly 3.1 × 10⁻²⁵ kg).
Important Notes:
* The Higgs Boson: The Higgs boson is not the heaviest particle, as there are particles like the top quark that are heavier. However, it's important because it gives mass to other particles.
* Composite Particles: Many particles like protons and neutrons are composite particles, meaning they are made up of smaller particles called quarks.
* Continuously Expanding Knowledge: New particles are constantly being discovered, and our understanding of their masses is constantly evolving. This list is just a snapshot of our current knowledge.
Remember that this is a simplified list, and the world of particle physics is vast and complex.
