Which of the following correctly defines the first ionization energy: A) A(s) → A⁺(s) + e^-(g); I₁ = E(A⁺, s) - E(A, s) B) A(g) → A⁺(g) + e^-(g); I₁ = E(A, g) - E(A⁺, g) C) A(g) → A⁺(g) + e^-(g); I₁ = E(A⁺, g) - E(A, g).

Question

Quizplus · Accepted Answer

First ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral atom in the gaseous state to form a cation and an electron, both in the gaseous state. The correct expression is the energy of the ionized atom plus electron subtracted from the energy of the neutral atom, indicating the energy input required for the process.

Which of the Following Correctly Defines the First Ionization Energy