Colloid

colloid (קולואיד)
- also called: colloidal dispersion, colloidal suspension
  - ”The term colloidal suspension refers unambiguously to the overall mixture” (Wikipedia)
- “a dispersion of small particles (from 1 nm to 1 mm in diameter) in a solvent” (Jones, 2016)
- “A mixture having particles that are moderately large. Colloids pass through filters but cannot pass through semipermeable membranes.” (Timberlake, 2017)
- colloidal dispersion: “A system in which particles of colloidal size of any nature (e.g. solid, liquid or gas) are dispersed in a continuous phase of a different composition (or state). The name dispersed phase for the particles should be used only if they have essentially the properties of a bulk phase of the same composition.” IUPAC
particle size: $1 nm - 1 μ m$
Tyndall effect (or Tyndall scattering)
related terms:
- adsorption (סְפִיחָה)
- adhesion
- absorption (סְפִיגָה)

Suspension

suspension (תַּרְחִיף)
- “a heterogeneous mixture that contains particles much larger than a colloidal dispersion” (Denniston, 2022)
- “A mixture in which the solute particles are large enough and heavy enough to settle out and be retained by both filters and semipermeable membranes.” (Timberlake, 2017)
- “A suspension is not a true solution, nor is it a precipitate.” (Denniston, 2022)
particle size: $> 1 μ m$

aerosol (אֵרוֹסוֹל, אֶרְסָס)
- aerosol spray
- spray (תַּרְסִיס)
emulsion (תַּחְלִיב, אֵמוּלְסִיָּה)
- examples:
  - homogenized milk
- process: emulsification (תִּחְלוּב)
- emulsifier (מְתַחְלֵב, חֹמֶר מְתַחְלֵב)
- emulsify (v.) (תִּחְלֵב)
foam
gel (גֵ’ל, תַּקְרִישׁ, מִקְפָּה)

Jones, Loretta (2016). Chemical Principles. W. H. Freeman.
Timberlake, Karen C. (2017). Chemistry: An Introduction to General, Organic, and Biological Chemistry. Pearson.
Denniston (2022). General, Organic, and Biochemistry. McGraw-Hill Education.