Periodic Chart of the Atoms
date: label: Date made
content: 1963
name: label: maker
content: Welch Scientific Company
notes: label: Description
content: In the late 19th century, the Russian chemist Dimitry Ivanovich Mendeleev developed several charts in which chemical elements were grouped according to common properties. The atomic theory of matter developed over the next century suggested that these groupings could be explained by similarities in atomic structure.
label: Description
content: In 1924, Henry D. Hubbard of the U.S. National Bureau of Standards prepared a "Periodic Chart of the Atoms" that included symbols for the elements, atomic numbers, atomic weights, and descriptions of atomic structure. In the course of the twentieth century, numerous new elements were discovered and added to the chart. Physical data on the properties of elements also was incorporated. Wall charts became a fixture of the chemistry classroom.
label: Description
content: The Periodic Chart of the Atoms was revised regularly by the NBS and published by the W. M. Welch Science Company of Chicago. This is the 1963 version of the chart, as prepared by spectroscopist William F. Meggars. High schools could purchase the charts with aid from the U.S. government. Some chemists working on curriculum projects of the time also prepared new forms of the periodic table.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Chemistry
label: See more items in
content: Sputnik
label: See more items in
content: Science & Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1994.0019.01
label: accession number
content: 1994.0019
label: catalog number
content: 1994.0019.01
objectType: label: Object Name
content: chart, periodic table
physicalDescription: label: Measurements
content: rolled: 58 in x 3 1/4 in; 147.32 cm x 8.255 cm
label: Measurements
content: overall; rolled: 58 in x 2 5/8 in; 147.32 cm x 6.6675 cm