The state or quality of having two valences, or the capacity to combine with two atoms or radicals in chemistry.
From 'di-' (two) + 'valence' (from Latin 'valentia' meaning strength or capacity). In chemistry, it refers to an element's combining power.
Divalence is why oxygen is so special—its two-valence nature makes it bind perfectly with hydrogen to create water, one of the most essential molecules for life.
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