For a potassium-chlorine ion pair, our textbook (problem 2.19) tells us that the attractive energy EA (in eV) for this pair is: EA= -1.436/r where r is the distance (in nm) between the centers of the two ions. The repulsive energy ER (in eV) for this pair is: ER= 5.86 x 10-6/r9 The attractive energy comes from Coulomb’s law where the repulsive energy is provided by an empirical equation(i.e., it fits data rather than it is derived based on a model). (a.) Using only the information provided above, calculate the equilibrium separation distance between K1+ and Cl1- in nanometers(ro). (b.) Based on your answer to (a.), calculate the so-called binding (or bonding) energy in eV. This is the “depth” of the energy well.
Electron Affinity
When an element undergoes a chemical reaction, it either gains energy or loses energy. This gain or loss of energy is due to the phenomena that occur at atomic level. During reaction, atoms either gain electrons from other atoms or lose electrons to other atoms, and in that process, energy is produced.
P-Block Elements
Elements which are present on the right side of the periodic table are called p-block elements. In addition to the noble gases, they include the families of boron, mercury, nitrogen, oxygen and fluorine. These elements have diverse real-life implementations that we regularly experience around us.
Metals and Non-metals
The periodic table is composed of metals, semi-metals and nonmetal elements. The physical and chemical properties of metals and nonmetals differ from each other. The study of metals and nonmetals will help one to understand the appropriate application of the particular element.
For a potassium-chlorine ion pair, our textbook (problem 2.19) tells us that the attractive energy EA (in eV) for this pair is:
EA= -1.436/r
where r is the distance (in nm) between the centers of the two ions. The repulsive energy ER (in eV) for this pair is:
ER= 5.86 x 10-6/r9
The attractive energy comes from Coulomb’s law where the repulsive energy is provided by an empirical equation(i.e., it fits data rather than it is derived based on a model).
(a.) Using only the information provided above, calculate the equilibrium separation distance between K1+ and Cl1- in nanometers(ro).
(b.) Based on your answer to (a.), calculate the so-called binding (or bonding) energy in eV. This is the “depth” of the energy well.
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