Compounds

• ionic compound (or salt^{1 2})

  • “a chemical compound consisting of an assembly of cations and anions, which results in a compound with no net electric charge. The constituent ions are held together by ionic bonds.” (Wikipedia)
  • “A compound that consists of ions in a ratio that results in overall electrical neutrality” (Jones, 2016)
  • ionic compounds are not molecules

• molecular compound (or covalant compound)

  • “consists of electrically neutral molecules” (Jones, 2016)

• compounds made up of a metal and a nonmetal are typically ionic compounds. compounds made up of two nonmetal are typically molecular compound.

  • examples:
    • $\mathrm{NaCl}$, $\mathrm{MnO}$, $\mathrm{CaCl}{}_2$ (metal and nonmetal, ionic compound)
    • $\mathrm{CO}{}_2$, $\mathrm{H}{}_2\mathrm{O}$, $\mathrm{CH}{}_4$ (two nonmetal, molecular compound)
  • non-examples:
    • $\mathrm{SnCl}{}_4$, $\mathrm{Mn}{}_2\mathrm{O}{}_7$ (metal and nonmetal, molecular compound)
    • $\mathrm{NH}{}_4\mathrm{Cl}$ (two nonmetal, ionic compound)

• A binary, ternary, or quaternary compound is a compound that contains two, three, or four different elements, respectively.

Solids

• amorphous solid (or non-crystalline solid) (מוצק אמורפי)

  • amorphous metal (or metallic glass)

• crystal (or crystalline solid) (גביש, מוצק גבישי)

  • crystallization – “the process in which molecules, ions, or atoms come together to form a crystalline solid” (Brown, 2012)
  • crystal structure (מבנה גבישי)
    • unit cell
    • crystal lattice
    • lattice point
    • lattice vector
  • types:
    • ionic crystal
      • ionic bonds
    • network solid (or covalent network solid) (סריג אטומרי, מוצק אטומרי)
      • covalent bond
    • metallic solid
      • metallic bond

• molecular solid (גביש מולקולרי)

• macromolecule

• nanomaterials

• polymer

• monomer

References

• Jones, Loretta (2016). Chemical Principles. W. H. Freeman.
• Brown, Theodore L. (2012). Chemistry. Prentice Hall.

Footnotes

1. https://chemistry.stackexchange.com/questions/86399/are-all-ionic-compounds-salts ↩

2. https://en.wikipedia.org/wiki/Salt_(chemistry)#:~:text=salt%20is%20a%20subtype%20of%20ionic%20compound ↩