This 'solar system' model of the atom is the way that most people think about atoms today. It is known as the Rutherford-Bohr model of atomic structure. The neutron was difficult to discover ...

Quantum physics began in 1900 when the German physicist Max Planck determined the scale of quantum phenomena. In 1905, Albert ...

Save guides, add subjects and pick up where you left off with your BBC account. Protons and neutrons are the heaviest particles in an atom and as a result they make up most of its mass. The mass ...

Bohr's theory of the atoms more complex than hydrogen and helium—or give up van den Broek's hypothesis, that the charge of the nucleus of Rutherford's atom is equal to the atomic number (which ...

Author Dava Sobel discusses how she discovered the many forgotten female scientists who were mentored by Marie Curie in early 20th-century Paris ...

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Why saying who was first to split the atom is almost as hard as mastering atomic theory. Trump speech hailed the US feat, but New Zealander Sir Ernest Rutherford oversaw the trial in Manchester.

The "A" stands for "atomic," and was quickly adopted as a name for the earliest nuclear weapons. The A-Bomb wasn't just tested by the U.S., as it was infamously used twice against an enemy ...

Many atomic ... theory. Measurements on the stable isotope Bi-209 were recently consistent with the theoretical prediction. However, there were still doubts as to whether the influence of the ...

Tech giants are looking for more energy, but building new reactors takes time. In the AI arms race, all the major players say ...

Richard Garwin’s role in designing the hydrogen bomb was obscured from the public, even his family, as he advised presidents ...