the top quark is the heaviest known elementary particle. It has a mass of around 173 GeV/c² (gigaelectronvolts per speed of light squared), which is significantly larger than the masses of other elementary particles. The top quark's mass is even larger than the Higgs boson, which is known for giving mass to other particles.
It's important to note that scientific knowledge is constantly advancing, and new discoveries can occur. Therefore, it's advisable to consult more recent sources or research to obtain the most up-to-date information on particle physics and any potential discoveries regarding particles heavier than the top quark.