Chemistry

• baiyun

  2 May 10, 07:34

  Please help.

  1)Particulate model of matter and Kinetic particle theory?  What’s the difference between them?

  2)Do all compounds exist as molecules?

  Thank you.

• UltimaOnline

  2 May 10, 14:51

  Originally posted by baiyun:

  Please help.

  1)Particulate model of matter and Kinetic particle theory?  What’s the difference between them?

  2)Do all compounds exist as molecules?

  Thank you.

  
  1) No difference, as far as 'O' levels or 'A' levels are concerned.

   

  2) No. Molecules imply only covalent bonding present (eg. H2O). Some compounds are ionic in terms of their bonding. (eg. Na+ Cl-).