Ciro Santilli @cirosantilli  40

Reactor of the Hanford site of the produced the plutonium used for Trinity and Fat Man.

This was the first full scale nuclear reactor in the world, and was brought up slowly to test it out.

composite particle made up of an odd number of elementary particles.

The most important examples by far are the proton and the neutron.

composite particle made up of an even number of elementary particles, most commonly one particle and one anti-particle.

This can be contrasted with mesons, which have an odd number of elementary particles, as mentioned at baryon vs meson vs lepton.

Gwern Branwen's website.

One thing that annoys Ciro Santilli about that website are the footnote overload. Ciro likes linear things.

A single layer of graphite.

Only present in Gram-negative bacteria.