Cs⁺ < K⁺ < Mg²⁺ < Al³⁺

Al³⁺ < Mg²⁺ < K⁺ < Cs⁺

Mg²⁺ < Al³⁺ < K⁺ < Cs⁺

K⁺ < Cs⁺ < Mg²⁺ < Al³⁺

Li⁺ < K⁺ < Na⁺

Na⁺ < Mg²⁺ < Al³⁺

K⁺ < Na⁺ < Li⁺

Al³⁺ < Mg²⁺ < Na⁺

MX

MX₂

MX₃

MX₄

AB

A₂B

AB₂

AB₃

Electron affinity of Na⁺

Electronegativity of Na⁺

Electron affinity of He

Ionisation potential of Mg