Lanthanum Element Properties
Interactive reference card for Lanthanum (La, #57) — explore atomic data, electron configuration, physical constants, and chemical behavior in one place.
Use the Lanthanum Element Properties
Lanthanum
Lanthanide series · Period 6 · Group 3 (IUPAC)
Soft, silvery-white rare-earth metal. First member of the lanthanide series. Highly reactive with water and air. Named from the Greek lanthanein ("to lie hidden").
Summary
Lanthanum (La) is a soft, silvery-white rare-earth metal with atomic number 57, the first member of the lanthanide series. This reference card collects its atomic mass (138.905 u), electron configuration, electronegativity, common oxidation states, melting and boiling points, and key chemical behavior in a single interactive view. Use it to study, compare, or cite accurate elemental data for Lanthanum.
How it works
- The card loads with all known Lanthanum properties pre-filled — no input required.
- Click any section tab (Overview, Atomic, Physical, Chemical) to jump to that data group.
- Use the Copy button next to any value to copy it to your clipboard instantly.
- The electron configuration diagram shows subshell occupancy visually.
- All values are sourced from IUPAC 2021 standard atomic weights and NIST data.
Use cases
- Quick homework or exam reference for Lanthanum atomic data.
- Laboratory work requiring precise physical constants (density, melting point).
- Chemistry teachers preparing lesson materials on rare-earth elements.
- Engineers sourcing material properties for lanthanum-based alloys or catalysts.
- Students learning electron configuration and periodic trends.
- Writers or journalists needing accurate element facts.
- Developers building chemistry apps who need a reliable data reference.
- Science fair projects exploring the lanthanide series.