Nuclear energy is growing around the world, just not much in the West. About 70 new reactors are under construction worldwide (NEI), with about 600 others planned for the next 30 years. Five reactors ...

Atoms are very small. They have a radius of around 1 × 10 10 metres. This symbol shows that chlorine has 35 particles in the nucleus (protons and neutrons), 17 of which are protons. It also tells us ...

Yuri Ralchenko led one of the oldest teams at the National Institute for Standards and Technology. The fate of some ...

North Korea warned this week that it might test a hydrogen bomb in the Pacific Ocean, after saying the country had already successfully detonated one. A hydrogen bomb has never been used in battle by ...

Iron is the main ingredient in various forms of iron and steel, but the various types of metals contain other elements as well. Sometimes these elements are unwanted; other times they're intentionally ...

Results for the limiting screening number as N → ∞ of an electron in the (nl) radial wave function of an atom with atomic number N, are extended to configurations including (4s), (4p) and (4d) ...