The most precise clocks in the world will lose only one second every 300 billion years—and someday they might fit in your ...

Why are there atomic clocks but no nuclear clocks? After all, an atom's nucleus is typically surrounded by many electrons, so in principle it should be less susceptible to outside noise (in the ...

Number of protons Z = 30 Number of protons + neutrons A = 64 Number of neutrons N = 64 - 30 = 34 Since this is a nucleus there are no electrons There are 30 protons and 34 neutrons.

The nucleus is very small compared to the atom as a whole: as electrons are even smaller, most of an atom is empty space the diameter of a nucleus can be 100,000 times less than the diameter of an ...

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 ...

Nucleons, the particles that make up the nucleus of an atom, are fundamental to understanding the universe's building blocks.

A sodium and chlorine atom are near each other. An electron from each atom feels the attraction from the other atom's nucleus. The attraction by chlorine is stronger than the attraction by sodium. An ...

At the cutting-edge Facility for Rare Isotope Beams, researchers have precisely measured the mass of aluminum-22, revealing ...

though the unnamed unit is not exactly an atom of hydrogen, but the nucleus, the main substance, of that atom.