In the atom the electron is the lightest.
A neutron is the subatomic particle with a charge of 0 and a mass of 1 atomic mass unit.
The tau neutrino has mass and is denoted with the symbol μ.
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.
Matter
The subatomic particle that has a mass slightly less than that of a neutron is the proton. While both protons and neutrons are nucleons found in atomic nuclei, the neutron has a slightly greater mass, making the proton's mass approximately 0.938 GeV/c² compared to the neutron's mass of about 0.939 GeV/c². This slight difference in mass plays a crucial role in nuclear interactions and stability.
A neutron is the subatomic particle with a charge of 0 and a mass of 1 atomic mass unit.
The tau neutrino has mass and is denoted with the symbol μ.
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.
The neutron is a subatomic particle that has mass nearly equal to that of a proton but carries no electrical charge.
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.
Matter
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
Both one proton and one neutron each has a relative mass of 1 a.m.u.
Hydrogen has the smallest atomic mass at roughly 1.008 grams per mol (6.02x10^23 atoms)