Element property finder
Look up symbol, Z, mass, and configuration snippet.
Calculator
How to use
Lookup
Uses bundled atomic mass and electron configuration data.
Educational use only. Double-check values for labs, homework, and exams.
Look up symbol, Z, mass, and configuration snippet.
Uses bundled atomic mass and electron configuration data.
Educational use only. Double-check values for labs, homework, and exams.
Model / formula
Look up by symbol or Z
Result
Iron (Fe), Z = 26 Atomic weight ≈ 55.845 g/mol Configuration: [Ar] 3d6 4s2