Question

Of the five elements Al, Cl, I, Na, Rb, which has the most exothermic reaction? (E represents an atom.) What name is given to the energy for the reaction? (Hint: Note the process depicted does not correspond to electron affinity.)

E+(g)+e−⟶E(g)
a) Cl; Ionization energy
b) Na; Ionization energy
c) Al; Electron affinity
d) Rb; Electron affinity

Answer 1

The most exothermic reaction among the elements Al, Cl, I, Na, and Rb is a. Cl (Chlorine), which has the most negative value for electron affinity.

Step-by-step explanation:

The most exothermic reaction among the elements Al, Cl, I, Na, and Rb would be a. Cl (Chlorine). An exothermic reaction releases energy, and in this case, Chlorine has the most negative value for electron affinity, indicating that more energy is released when an electron is added to a gaseous chlorine atom compared to the other elements.

The energy for the reaction is called electron affinity, which is the energy change that occurs when a neutral atom gains an electron.