Linked from
The 17 pages that link to Sodium ion, each with the reason it gives.
Sodium bicarbonateRelated: It is the cation paired with bicarbonate in the compound’s formula.
Sodium azideRelated: Sodium ions balance the negative charge of azide ions in the solid.
Monosodium citrateRelated: This counterion balances the negative charge of the citrate species.
Sodium sulfideRelated: Two sodium ions balance the charge of each sulfide ion in Na₂S.