Mepụta nsụgharị dị mgbagwoju anya nke ahịrịokwu a Soddy's hexlet bụ nkwupụta nke na-egosipụta eziokwu banyere akụkụ ndị na-emetụta ibe ha.
N'ezie, ụdị okwu dị mgbagwoju anya nke ahịrịokwu ahụ bụ "Soddy's hexlet bụ nkwupụta banyere ihe ndị na-emetụta ibe ha, nke Frederick Soddy bipụtara na 1937. "