The largest subatomic particle (by mass) is the proton. The mass of subatomic particles is measured in Atomic Mass units (amu). The proton has a mass of 1.007 amu, the neutron has a mass of 1 amu, and the electron has a mass of .0005 amu.
An Electron is the smallest visible sub-atomic particle. Below that you are basically "looking" at quantum particles.
In the atom the heaviest particle is the neutron.
In the atom neutron is the heaviest.
Neutron
Quark
nucleau
Subatomic particle
Matter
protone
An electron particle
In the atom the electron is the lightest.
Subatomic particle
An "element" is not a subatomic particle. Your question makes no sense and is therefore unanswerable.Another answer:Since an element is not a subatomic particle, the only answer can be a proton.
Hydrogen has the smallest atomic mass at roughly 1.008 grams per mol (6.02x10^23 atoms)
Matter
protone
The neutron is the subatomic particle that has appreciable mass and lacks a charge.
The neutron is a subatomic particle that has mass nearly equal to that of a proton but carries no electrical charge.
An electron particle
Protons and neutrons have the mass of 1 amu.
The electron has the smallest mass between subatomic particles: 9,10938291(40).10-31 kg.
neutron
the neutron