Standard model gets right answer for proton, neutron masses. ... This charge is similar to electric charge but comes in three different types, whimsically referred to as red, ...

The second is their different electric charges. The up quark has a charge of +2/3 in units of the proton charge, while the down quark has a negative charge of -1/3. If charge symmetry was exact, the ...

An atom consists of a heavy center, called the nucleus, made of particles called protons and neutrons. An atom has lighter ...

Neutrons are subatomic particles with no electrical charge, and a slighter higher mass than a proton. Due to quantum degeneracy pressure neutron stars are supported against further collapse.

For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass, it seemed that something besides the protons in the nucleus ...

It’s the early 1950s, and people pretty much agree that a neutrino exists. No one has found it, and because it’s nearly massless and completley chargeless no one can figure out how to find it.

The neutrons’ lack of charge and long lifetime minimized the effect of forces other than gravity. Classically, the energy spread of the bouncing neutrons – and so the range of heights to which they ...

The team analyzed data from two radio telescopes – the Robert C. Byrd Green Bank Telescope in the US and the Effelsberg 100-m Telescope in Germany – as they observed two nearby neutron stars ...

Rutherford also put out the idea that there could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron.