# What elements make up ionic compounds?

Jan 26, 2017

Typically the ions of metals, and non-metals.........

#### Explanation:

Metals are electron-rich species that tend to be reducing, and thus typically form ${M}^{+}$, ${M}^{2 +}$, and ${M}^{3 +}$ ions:

$M \rightarrow {M}^{+} + {e}^{-}$; $M \rightarrow {M}^{2 +} + 2 {e}^{-}$ etc.....

Non-metals species are typically found on the the righthand side of the Periodic Table as we face it; their (enhanced) nuclear charge tends to make them oxidizing:

${X}_{2} + 2 {e}^{-} \rightarrow 2 {X}^{-}$

Given the appropriate stoichiometry, a redox process (i.e. electronic transfer) can result in salt formation:

$M + {X}_{2} \rightarrow {M}^{2 +} {X}_{2}^{-}$
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