The question of where atoms come from requires a lot of physics to be answered completely – and even then, physicists only have good guesses to explain how some atoms are formed.

Richard Feynman, a famous theoretical physicist who won the Nobel Prize, said that if he could pass on only one piece of ...

Now, most of the atoms in the universe are the two simplest kinds: hydrogen, which has one proton, zero neutrons and one electron; and helium, which has two protons, two neutrons and two electrons.

Now, most of the atoms in the universe are the two simplest kinds: hydrogen, which has one proton, zero neutrons and one electron; and helium, which has two protons, two neutrons and two electrons. Of ...

Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has been getting bigger since the Big Bang. When the hydrogen and helium atoms ...

Each hydrogen atom consists of one electron and one proton, and physicists have generally assumed that the positive electrical charge of the proton is exactly equal to the negative charge of the ...

Structural, computational, and spectroscopic analyses of 1-Ln support the presence of a three-center one-electron σ bond of d z2 parentage. In the case of 1-Gd, valence delocalization enforces a ...