[LoneRangerMassachusetts]

What happened to protons and neutrons? When I was a kid we learned that a cloud of electrons orbited around a clump of protons and neutrons.

[ahayes]

Protons and neutrons are made up of quarks. Currently they don't think electrons are made of anything smaller.

[RightWhale]

we learned that a cloud of electrons orbited around a clump of protons and neutrons.

They're still there as general classification systems in chemistry, but they have structure.

[RightWingAtheist]

No offense, but how long ago were you in school? Quarks are a relatively recent discovery, and you probably wouldn't have been taught about them in school until oh, the early-mid seventies, at the earliest.