The small but ubiquitous proton serves as a foundation for the bulk of the visible matter in the universe. It abides at the ...

Static electricity works because electrons are strongly attracted to protons, right? But, in atoms, electrons are right there, next to the protons in the nucleus. Why don’t the electrons zip directly ...

The molecular hydrogen ion H₂⁺ is the simplest molecule. This simplicity makes it a perfect study object for physicists, as ...

There is so much more to these “negatively charged particles” than we've thought. You learned what an electron is in school… or DID YOU? You probably learned that it’s a “negatively charged particle” ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Measuring up: an electron scattering experiment yields a small proton radius. (Courtesy: Jefferson Lab) For nearly a decade the size of the particle that makes up the bulk of the universe’s visible ...

Philosophical Transactions: Biological Sciences, Vol. 360, No. 1464, Reactive Oxygen Species in Health and Disease (Dec. 29, 2005), pp. 2315-2325 (11 pages) The NADPH oxidase is the main weapon of ...

If you expanded an atom to the size of a baseball, what would it look like? And how would the inside look if you sliced it open? The nucleus is the atom’s central core and contains more than 99.9 ...