The exact origins of the universe, what could lay outside it and how the atomic nucleus
came to be there in the first place, are questions scientists are still striving to answer.
01 percent of tantalum is found in this state; it is the rarest known long-lived nuclide, or variety of atomic nucleus
But we have shown that by using lasers to orient the electrons in a very specific way, one can use the orbiting neutron of an atomic nucleus
as the clock pendulum, making a so-called nuclear clock with unparalleled accuracy," he added.
Of course it didn't make too much sense that the atomic nucleus
should consist of protons.
The suspected discovery of an atomic nucleus
with four neutrons but no protons has physicists scratching their heads.
For twenty years, it had been assumed that the atomic nucleus
was made up of protons and electrons, since these were the only two subatomic particles known.
The study reveals a novel arrangement of matter made of quarks, the basic constituents of Lambda (1405) and every atomic nucleus
in the universe.
As soon as the neutron was discovered by Chadwick (see above), Heisenberg (see 1925) pointed out that the atomic nucleus
must be made up of protons and neutrons rather than protons and electrons.
By 1911, Rutherford had identified the atom's internal storehouse for all that energy--the dense, positively charged core that came to be known as the atomic nucleus
(see Page 30).