Chemical combination 2

CHEMISTRY  SSS1  Second Term

WEEK 2

Chemical combination 2

Performance Objectives

The student should be able to:

  1. Explain hydrogen bonds with examples
  2. Explain van der-Waal forces with examples
  3. Write the IUPAC name of common substances

Content

Hydrogen bond

A hydrogen bond is a weak type of force that forms a special type of dipole-dipole attraction which occurs when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons. These bonds are generally stronger than ordinary dipole-dipole and dispersion forces, but weaker than true covalent and ionic bonds.

A hydrogen atom attached to a relatively electronegative atom is a hydrogen bond donor. This electronegative atom is usually fluorine, oxygen, or nitrogen. The electronegative atom attracts the.... View More

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