Henry D. Hubbard

Periodic Chart of the Atoms, 1963

Harry D. Hubbard was a member of the U.S. Bureau of Standards in the 1920s. In 1924 he produced a Periodic Table of Elements (called the Periodic Chart of the Atoms) which was distributed to schools and universities.^[1] This version of the periodic table placed the main groups in columns with some later groups taking up two rows per period and the Group VIIIB transition metals displayed out to the right of the noble gases. The noble gases themselves were shown first in Column 1 (Valence 0) and repeated in Column 9 (Group VIII). The table is also notable for including the solo Neutron as an entry on its own, "above" Hydrogen, and given the symbol lower-case 'n'.

References

External links

• Video about a 1930s Hubbard Periodic table found in the University of Rio de Janeiro, Brazil showing discredited elements ₈₇Virginium, ₆₁Illinium, ₈₅Alabamine and ₄₃Masurium.