Graphic representation of the periodic table of chemical elements designed as a left-side electronic configuration series table with the alkali metals and nonmetals combined into one block of representative elements.…

Graphic representation of the periodic table of chemical elements designed in the style F.M. Shemi︠a︡kin (Fedor Mikhaĭlovich), with additional groups and subgroups. This table was originated by A.I. Mashentsev in 1954…

Graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. This table was originated by chemist Edward…

Graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. This table was originated by chemist Edward…

Graphic representation of the periodic table of chemical elements designed as a left-step series table with oblique series and Group IIa positioned on the right-hand side of the table. This table was originated by…

Partial graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. The section displayed here depicts…

Partial graphic representation of the periodic table of chemical elements designed as a left-step series table with the symbols of the elements arranged according to their valences. The section displayed here depicts…

Graphic representation of the periodic table of chemical elements designed as a series table with eight groups and three subgroups in which the rare earth elements are placed in one series. This table was originated by…

A brief, illustrated history of Tungsten, or wolfram, a rare metal first isolated by Swedish Pomeranian and German pharmaceutical chemist Carl Wilhelm Scheele (1742-1786) and Spanish chemists and brothers José…

Graphic representation of the periodic table of chemical elements in the style of an irregular spiral. While the design of this table is unattributed, it bears some similarity other spirals classified by chemist Edward…

Top and perspective views of a graphic representation of the periodic table of chemical elements in the style of a helix on a cone. While the design of this table in unattributed, it bears some similarity to Types…

Two graphic representations of the periodic table of chemical elements depicted as a spiral with eight radii. While the design of these tables is unattributed, it bears some similarity to Types IB2-2, IB2-4, and IB2-5…

Illustration depicting different types of two-dimensional curves on a plane, including spiral, plane lemniscate, and concentric circles. These plane curves are top views (projections) of the three-dimensional space…

Graphic representation of the periodic table of chemical elements designed as a right-side electronic configuration series table. While the design of this table is unattributed, it bears some similarity to Subtype…

Graphic representation of the periodic table of chemical elements designed as a right-side electronic configuration series table. While the design of this table is unattributed, it bears some similarity to Subtype…

Graphic representation of the periodic table of chemical elements designed as a series table consisting of two parts that are arranged like mirror-images of one another. While the design of this table is unattributed,…

Graphic representation of the periodic table of chemical elements designed as a step table with interrupted short and medium periods. While the design of this table is unattributed, it bears some similarity to Type…

Illustration depicting different types of three-dimensional space curves, including helix on cylinder, helix on cone, space lemniscate, and space concentric circles. The space curve is a type of dimensional graphic…

Graphic representation of the periodic table of chemical elements in the style of Dmitri Mendeleev with additions and alterations by Edward G. Mazurs. Mendeleev originated this type of series table with steps to the…

Graphic representation of the periodic table of chemical elements designed as a step table with Group IIa positioned on the right-hand side. While the design of this table is unattributed, it bears some similarity to…

The Graphic Periodic Selector of the Elements visually demonstrates the periodicity of the elements. A single setting of the slide will simultaneously illustrate the arrangement of electrons around the nucleus of the…

Double-sided reference sheet depicting Table of Periodic Properties of the Elements on the front with a Periodic Table of the Elements on the reverse.

Reproduction of a periodic table designed in the style of a spiral by Dr. Theodor Benfey, Professor of Chemistry, Guilford College. The table was originally published on page 27 of the January 1970 edition of CHEMISTRY.

A Periodic Chart depicting the relative abundance of the elements.

Components of a mass spectrometer as designed by Alfred Otto Carl Nier (1911-1994). Mass spectrometers are analytical instruments used to measure the mass-to-charge ratio of one or more molecules in a sample. The…