CH-1010 Chapter Notes - Chapter 4: Radiant Energy, Lewis Acids And Bases, Electromagnetic Spectrum
Document Summary
Binary (two element) ionic compounds consist of combinations of cations formed from metallic elements and anions formed from nonmetals. These ions are held together by the electrostatic attraction that ions of opposite charge have for each other. The strength of this attraction is a form of potential energy called electrostatic potential energy. The value of eel between a pair of ions is directly proportional to the product of their charges (q1 and q2) and inversely proportional to the distance (d) between their nuclei. Eel = 2. 31 * 10 -19 j *nm( (q1 * q2) / d) Two ions that have the same charge -- that is two positive or two negative ions repel each other this will create a positive eel value. Conversely, the attraction between a positive ion and a negative ion produces a negative eel : the greater the attraction, the more negative the eel. More negative energy values correspond to more stable configurations of particles.
