Electron configurations are traditionally expressed in textual notation, which is human-readable but inefficient for computational systems. This work introduces AEC-64, a compact and self-describing 64-bit binaryformat encoding the complete electron configuration of any chemical element (Z = 1--118). AEC-64 consists of an 8-bit Layout Index and a 56-bit payloadrepresenting electron counts across all subshells from 1s to 7p. The Layout Index defines the segmentation of the payload, enabling unambiguousdecoding without external lookup tables. This manuscript presents the mathematical foundations, formal specification, encoding and decoding algorithms, configuration-space analysis, andworked examples for representative element classes.
Dogan Balban (Tue,) studied this question.