Models Of Chemical Elements And Compounds

Portugal
Portuguese Engineers and Engineering
October 19, 2012
Set of seven, one stamp shows composite material (material engineering), test tubes and periodic table (chemical engineering), and formula and model of organic compound (biological engineering).

Portugal
Aquihaselo - Science in Portugal
March 4, 2009
The design shows a space-filling model of the active center of an enzyme CotA-lacase, which has been identified in the bacteria Bacillus subtilis.
(Designer: Nuno Micaêlo)

Belgium
The 15th International Congress of radiology
April 4, 1918
Set of two, one stamp depicts molecular model of radioactive source.

Japan
Science Technology and Animation
March 23, 2004: 3D model of conductive polymer
August 23, 2004: 3D model of fuel cell

United States
STEM Education
April 6, 2018
Set of four, the Science stamp shows a ball-and-stick model of the carbon cage structure of 1,3,5,7-Tetramethyladamantane.
(Designer: David Plunkert)

Portugal
Continuing Education
July 20, 1977
Set of four, one stamp shows ball-and-stick model of a crystal structure.

Moldova 2018 Alexander Fleming and the chemical structure of penicillin.

Czech Republic
60 Years of the Joint Institute for Nuclear Research in Dubna
March 16, 2016
The stamp shows ball model of an atomic nucleus composed of protons and neutrons.

Switzerland
Pro Juventute Issue
November 24, 1989
Set of four, one stamp depicting research and study shows the ball-and-stick model of a chemical molecule.

Romania
International Year of Chemistry
September 26, 2011
The stamp depicts Austrian mineralogist and chemist Franz-Joseph Müller von Reichenstein who discovered Tellurium in 1782. The design also shows electron shell model of the chemical element.

US SC 4224 - Gerty Cori - part of 2008 American Scientists issue.

Shows structure (though incorrect) of Glucose-1-Phosphate

Chile
Copper 87 International Conference
November 13, 1987
The souvenir sheet shows a ball-and-stick model of the unit cell of chalcopyrite, a copper iron sulfide mineral.

Monaco
30th Anniversary of Anti-Doping Convention
February 28, 2020
The design shows ball-and-stick model to symbolize illicit doping compounds.

Portugal
International Year of Crystallography
July 21, 2014
Set of five stamps and a minisheet. The stamp entitled Mathematics depicts the speciman and a 3D ball-and-stick model of the mineral pyrite (iron sulfide).

To commemorate the International Year of Light 2015 and the Noble Prize 2013 for computational chemistry to Israeli scientists, Israel issued on February 10, 2015, the following stamp depicting a three dimensional model of the Rhodopsin protein molecule. This protein, expressed in the light sensitive cells in the human retina, binds retinal, a small light sensitive molecule. The left side of the stamp depicting the Schrödinger equation, which is the most fundamental tool of quantum mechanics:

The stamp tab depicting the light sensitive cells in the human retina, rods and cones, responsible for black-and white and color visions, respectively.