Answer:
Rb(g) → Rb⁺(g) + e⁻ I₁ = 1st ionization energy
Explanation:
Here we have
Rb(g) → Rb⁺(g) + e⁻
The equation is of the form
X → X⁺ + e⁻
An atom that is made up of more than one electron requires a steadily increasing amount of energy to remove each successive electron. The ionization energy I₁ to remove the first electron is the first ionization energy, which can be defined as follows
E(g) → E⁺(g)+ e⁻ I₁ = 1st ionization energy
Similarly, the second ionization energy is given by
E⁺(g) → E²⁺(g) + e⁻ I₂ = 2nd ionization energy and so forth.
