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

The word magic is not often used in the context of science. But in the early 1930s, scientists discovered that some atomic ...

Many heavy atoms form from a supernova explosion, the remnants of which are shown in this image. NASA/ESA/Hubble Heritage ...

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.

An atom consists of a heavy center, called the nucleus, ... So, the hydrogen and helium atoms could form only once the universe cooled down to something like 5,000 degrees Fahrenheit ...

An atom consists of a heavy center, called the nucleus, ... So, the hydrogen and helium atoms could form only once the universe cooled down to something like 5,000 degrees Fahrenheit ...

Different isotopes are distinguished by the number of neutrons in the nucleus: helium-3 contains one neutron alongside the two protons, while the heavier helium-4 contains two neutrons.