Who expected the eighth period on the periodic table to follow previously established patterns ?
Period , the time taken for one full oscillation ; see on frequency Orbital period , the time for one object to complete an orbit around another Period ( periodic table ) , a horizontal row of the periodic table Period , euphemism for menstruation , the periodic discharge of blood and mucosal tissue ( the endometrium ) from the uterus and vagina Period ( gene ) , a gene in " Drosophila " involved in regulating circadian rhythm Period ( geology ) , a subdivision of geologic time