31.2 Atomic bond ing Bond ing forces and energies FN=FA+FR F入 N: net force F: attractive force FR: repulsive force
§1.2 Atomic bonding ◆Ⅰ.Bonding forces and energies FN : net force FA : attractive force FR : repulsive force FN = FA + FR
Atrrctve Force Net 号PEgL Force Repulsive Force Distance between atoms
Bonding energies E=「Far For atomic systems Ex=E+E N R
E = Fdr For atomic systems: EN = EA + ER Bonding energies:
Low Temperature (Equilibrium Spacing) Atom Distance
l Primary interatomic bonds 1. lonic bonding lonic bonding is always found in compounds that are composed of both metallic and nonmetallic elements, elements that are situated at the horizontal extremities of the periodic table
◆ Ⅱ.Primary interatomic bonds 1. Ionic bonding Ionic bonding is always found in compounds that are composed of both metallic and nonmetallic elements, elements that are situated at the horizontal extremities of the periodic table