Positive atomic nuclei attract negative electrons.

Connection between life and radioactive nuclei is straightforward.

The On Line Isotope Mass Separator (ISOLDE), which is used to study unstable nuclei.

Photons can also be absorbed by nuclei, atoms or molecules, provoking transitions between their energy levels.

This augments the natural process, where sea salt from the oceans provides water vapor with the cloud condensation nuclei.

To achieve this requires using a magnet to accelerate a plasma that is a big flame of deuterium and tritium nuclei.

But small atoms want to join together, small nuclei want to join together to make bigger ones to go towards iron.

And strong interactions are happening millions of times each second in every atom of our bodies, holding the atomic nuclei together.

The problem is that fusion involves joining two positively charged nuclei and, as basic science shows, same sign charges repel each other.

He authored the new concept of activity of the galactic nuclei (cores, central condensations), to have a decisive role in the genesis and evolution of the galaxies and their systems.

Only at extremely high temperatures over 100 million degrees Celsius, or almost ten times hotter than the sun do the nuclei move so rapidly that they overcome their repulsion and fuse.

While hydrogen nuclei cannot fuse to form helium until the temperature reaches about 10 million K, lithium and beryllium are destroyed at temperatures of 2.5 million K and 3.5 million K respectively.

An important research of Ambartsumian and his followers was dedicated to the blue ejections from the nuclei of the gigantic galaxies, galaxy systems of new type, the so called compact galaxies, etc.

In 1920, Sir Arthur Eddington proposed that the pressures and temperatures at the core of the Sun could produce a nuclear fusion reaction that merged hydrogen (protons) into helium nuclei, resulting in a production of energy from the net change in mass.