Periodic Table: Historical & International — ReviseForge

PeriodicForge HISTORICAL & INTERNATIONAL

A tool by Leon Dudhill

1869

Mendeleev's Original Table

Loading…

NOTE Historical layouts are approximations for educational purposes. Mendeleev's original table used atomic mass ordering and had gaps for undiscovered elements — these are shown as placeholders. The Janet left-step table is considered by some chemists to be the most logically consistent arrangement. Group numbering systems vary by country and era.

DISCLAIMER This tool was built for my own personal GCSE revision. You're welcome to use it, but it may contain errors and shouldn't be solely relied upon. Consider this a beta test. — Leon Dudhill