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Chemistry tools › Tool
Mendeleev · Tool
Compare Elements
Compare two elements side by side: atomic number, period, group, block, phase, atomic weight and electron configuration.
Tool↔
Side-by-side comparison makes periodic relationships easier to see. Elements in the same group often share important chemical patterns, while moving across a period changes the electron configuration one step at a time.
This tool deliberately uses only properties already present in the shared 118-element dataset. It does not infer missing values for very heavy or short-lived elements. Follow either element link when you need the full reference page.