Monthly Archives: September 2014

NASA Meatball — On October 1, 1958, the National Aeronautics and Space Administration began operations. NASA had been created by President Eisenhower on July 29, 1958, to lead the United States efforts in the Space Race with the Soviet Union. NASA’s began operations almost one year after the Soviet Union launched their Sputnik […]

Today In Science History – October 1 – NASA Began ...

This entry was posted on September 30, 2014 by Todd Helmenstine (updated on October 1, 2018)

EDIT: This table has been updated to reflect corrections in the atomic weights of iron and gallium. The updated table can be found at German Periodic Table – Farbperiodensystemsder Elemente – 2015. This color printable periodic table is useful for those who need a Periodic Table in German. In addition to […]

Color Periodic Table In German – Farbperiodensystemsder Elemente

This entry was posted on September 30, 2014 by Todd Helmenstine (updated on January 24, 2015)

EDIT: This table has been updated to reflect corrections in the atomic weights of iron and gallium. The updated table can be found at Druckbare Periodensystems der Elemente – Printable German Periodic Table – 2015. This black and white printable periodic table is useful for those who need a Periodic Table in […]

Druckbare Periodensystems der Elemente – Printable Periodic Table in German

This entry was posted on September 30, 2014 by Todd Helmenstine (updated on January 24, 2015)

Today In Science History – September 30 – Hans Geiger

This entry was posted on September 30, 2014 by Todd Helmenstine (updated on September 30, 2021)

Printable 20 Amino Acids Study Sheet

This entry was posted on September 29, 2014 by Todd Helmenstine (updated on May 10, 2021)

Valine Structure — Amino acids are organic compounds containing an amino group (-NH2) and a carboxyl group (-COOH). This is the general structure of an amino acid: where R is the side chain functional group that distinguishes one amino acid from another. This is a table of the 20 amino acids derived from proteins. […]

20 Amino Acids

This entry was posted on September 29, 2014 by Todd Helmenstine (updated on January 31, 2022)

Today In Science History – September 29 – Rudolf Diesel ...

This entry was posted on September 29, 2014 by Todd Helmenstine (updated on June 21, 2021)

Tabla Periodica Elementos — EDIT: This table has been updated to reflect corrections in the atomic weights of iron and gallium. The updated table can be found at Imprimible Tabla Periódica de los Elementos en Color – 2015 Color Spanish Periodic Table. This color printable periodic table is useful for those who need a Periodic […]

Imprimible Tabla Periódica de los Elementos en Color

This entry was posted on September 28, 2014 by Todd Helmenstine (updated on June 21, 2021)

Tabla Periodica de los Elementos - BW — EDIT: This table has been updated to reflect corrections in the atomic weights of iron and gallium. The updated table can be found at Imprimible Tabla Periódica de los Elementos – Blanco y Negro 2015. This black and white printable periodic table is useful for those who need a Periodic Table in […]

Imprimible Tabla Periódica de los Elementos – Blanco y Negro

This entry was posted on September 28, 2014 by Todd Helmenstine (updated on June 21, 2021)