The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and one electron in the region outside the nucleus. The electron and proton are attracted to each other.

The relative mass of a nucleus is the number of protons and ... The ion has two positive protons but one electron so it is a positive ion. Helium ion, two neutrons, two protons and three electrons.

One leading explanation was that there were electrons and additional protons in the nucleus as well -- the ... and imagined it as a paired proton and electron. There was no evidence for any ...

When two hydrogen atoms get close enough, the electron from each atom feels an attraction from the proton in the other atom's nucleus. This attraction pulls the atoms together. The electrons end up ...

Scientists trying to discover the elusive mass of neutrinos, tiny "ghost particles" that could solve some of the universe's ...

It can happen in one of two forms depending on whether a nucleus has too many neutrons or too many protons. In the first case, a neutron is converted to a proton and releases an electron and an ...

In Bohr’s model, if an electron orbit is not already ... the scientific community was unable to describe the nucleus in terms of individual protons and neutrons. Scientists used a more ...