A neutron.
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A sentence for neutron is:A neutron can be described as an uncharged elementary particle
It is a neutron.
A Neutron
In the atom the neutron is uncharged.
Yes, a photon is an elementary particle.
The neutron hasn't an electrical charge.
Neutrons are Neutral. (They don't have a charge.)
An elementary particle is considered to be a quark. A quark is a building block for subatomic particles.
This particle is the electron.
It is called the nucleus and has a mass unit number of one.
No, alpha particles are not uncharged. An alpha particle is actually a helium-4 nucleus, and that means it's composed of 2 protons and 2 neutrons. It will have an overall charge of +2, and we often write the alpha particle as He++ or He2+. The related question on what an alpha particle is can be found below. Check it out.