### substance | particle | fermion:

Baryon
* are fermions
  - from nus
  - hadrons with half-integral spin, whereas mesons have integral spin
  - in a family called Hadrons , which simply means that they are made of quarks
  - ordinary matter particles like protons and neutrons
  - part of a larger collection of subatomic compounds called Hadrons
* consist of three quarks while mesons consist of a quark and an anti-quark
  - quarks, mesons of a quark-antiquark pair
* contain three quarks while mesons contain only two quarks.
* have half-integral spin, whereas mesons have integral spin.
* increase compression in potential wells causing the peak heights to alternate
  - the mass of the fluid causing more infall and a net zero point displacement.
  * are part of a larger collection of subatomic compounds called Hadrons. Hadrons are simply particles made of quarks. The other type of Hadron is called a meson
+ Composite particle: Subatomic particles
  * Simple particles like protons are actually composites of multiple quarks. Protons are known as baryons, which means that they are made of exactly three quarks. Baryons are in a family called Hadrons, which simply means that they are made of quarks. The only other subcategory of Hadrons is Mesons, which are made of one quark and one antiquark.

### substance | particle:

Fine particle
* Most fine particles pass through gills
  - penetrate lungs
* Most fine particles suspend in air
  - water
* Some fine particles cause health problems
  - pass into organs
* are more biologically hazardous than larger particles
  - of concern because they are risk to both human health and the environment
  - tiny drops of liquid, dust, metal or other materials that float in the air
* can also penetrate indoors
  - be a by product of fossil fuel combustion, such as diesel and bus engines
  - soil manmade materials, speed their deterioration, and impair visibility
* come from motor vehicles, wood fires and industry.
* contain mostly man-made carbon, lead, sulphur and nitrogen compounds.
* kill thousands of people each year.
* pass easily into the deepest regions of the lungs, the alveoli, or alveolar sacs
* pollute water.
* react quickly, large particles react more slowly.
* result in better uniformity than large particles.

Fluid particle
* can interact with other principal particles.
* move anticyclonically around elliptical orbits
  - in a series of eddies or whirls
* rotate around the horizontal and vertical axis of the central particle.

Fundamental particle
* are loops of matter existent in Space.
* are the basic building blocks of matter, carry mass and charge
  - smallest particles in nature
* held together by ionic bond is called formula unit.

### substance | particle | fundamental particle:

Antineutrino
* fundamental particle
* have very little mass and no charge.

Antiparticle
* annihilate with particles to produce pure energy, all mass disappears.
* are elementary particles.
* behave very much the same as ordinary particles.
* exist for all particles.
* have negative lepton or baryon number, as appropriate.
* look and behave the same as ordinary subatomic particles.

Cosmic string
* are filaments, with regions in the symmetric phases, perhaps trapped in their core.
* fundamental particle
* is elementary particles.