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Yes. Neither photons nor gluons have a rest mass. Assuming gravitons exist, they would also be massless. The only gauge particles that we know of that have mass are the W and Z bosons, which are the gauge particles for the weak force. (it's possible that "dark energy" is a fifth force with its own gauge particles; if so, these gauge particles could be either massless or not).
The mass of neutrinos is so small that for a long time it wasn't known whether they were massless or not. (The observation of neutrino oscillation tells us that they do have mass; we still don't know exactly what their masses are, we just know it can't be precisely zero.)
All subatomic particles, even photons and gluons, have a ''relativistic'' mass, however. This is their energy expressed as a mass-equivalent (according to E = mc2).
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Which sub-atomic particle cannot change?
The sub-atomic particles does not change is electron. Electron not remains negatively charged but its mass remains the same too.
Sub atomic particle with an atomic mass unit of 1?
Either a proton or neutron has an atomic mass of 1. An electron's mass is actually extremely small in comparison. The majority of the weight of an atom is in the nucleus.
What is a sub atomic particle having an approximate mass of 1 amu and a relative charge of one plus?
Proton.
What is the subatomic particle that has the greatest mass?
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.
What sub atomic particle determines what the element is?
Proton
What is the atomic mass-?
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
What sub atomic particle does not particitpate in the calculation of mass of atom?
Mass of electron is not included for the calculation of mass of an atom.
What is the negative subatomic particle in an atom is called?
Negatively charged sub-atomic particle: electron. Positively charged sub-atomic particle: proton. Neutrally charged sub-atomic particle: neutron.
Which sub-atomic particle cannot change?
The sub-atomic particles does not change is electron. Electron not remains negatively charged but its mass remains the same too.
Which sub atomic particle makes up most of the mass of atom?
These particles are proton and neutron.
Sub atomic particle with an atomic mass unit of 1?
Either a proton or neutron has an atomic mass of 1. An electron's mass is actually extremely small in comparison. The majority of the weight of an atom is in the nucleus.
What is a sub atomic particle having an approximate mass of 1 amu and a relative charge of one plus?
Proton.
Is an electron a sub atomic particle?
Yes.
Which atomic particle has an atomic mass of one amu but no net charge?
This atomic particle is the neutron.
What is the subatomic particle that has the greatest mass?
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.
What an electron?
Negatively charged sub atomic particle
What is the neutral sub-atomic particle of an atom?
neutron
