21. (Continued)
When one atom gives up an electron that is used by another atom to
complete its valence shell, ____________________ bonding has taken
place.
ionic
22. Covalent bonding occurs when atoms "share" electrons in order to achieve
chemical stablity. In a germanium crystal, for example, the
the four valence electrons of a germanium atom need four more electrons to possess the eight
required for stability. As shown below, each germanium atom shares one electron with each of
its four neighboring atoms.
This sharing process continues throughout the crystal until all the atoms appear to have eight
valence electrons.
IT0341
1-18
Previous Page
