Posted on 10/23/2025 5:59:19 AM PDT by Red Badger
NATIONAL MOLE DAY
We'll eliminate any visions of a burrowing creature celebration immediately; National Mole Day recognizes a special number in chemistry. Chemists and chemistry students mark the occasion each year on October 23rd.
#NationalMoleDay
More specifically, the celebrations take place between 6:02 AM and 6:02 PM. In the U.S., the time and date are written 6:02 10/23. The time and date are derived from Avogadro’s number. Avogadro's number is approximately 6.02×10^23. Hence, defining the number of particles (atoms or molecules) in one mole of a substance, one of the seven base SI units.
A mole is a unit of measurement used in chemistry to express amounts of a chemical substance. Avogadro’s number is a historical term closely related to the Avogadro constant.
The Avogadro constant is named after the early 19th-century Italian scientist Amedeo Avogadro.
HOW TO OBSERVE NATIONAL MOLE DAY
There are several ways to celebrate this scientific day. Do you know how to use the mole in an equation?
Learn more about molecular science and Avogadro's number.
Explore the international system of measurement using moles.
Test your knowledge of chemistry. Celebrate with other chemists and chemistry students.
Conduct a mole experiment. While conducting it, see how many puns you can tell.
In your classroom, do a video with your students demonstrating what a mole is.
Create a rap about the mole. Be sure to include a little history of Amedeo Avogadro.
While reading up on Italian scientist Amedeo Avogadro, explore other chemists of his era.
Wear a t-shirt with 6.02×10^23 on it.
Share your knowledge using #NationalMoleDay to post on social media.
NATIONAL MOLE DAY HISTORY
An article in The Science Teacher in the early 1980s sparked National Mole Day. A chemistry teacher at Prairie du Chien Senior High School became inspired by the article and founded the National Mole Day Foundation on May 15, 1991.
Mole FAQ
Q. How many zeros are in a mole?
A. There are 22 zeros in a mole. It is written in standard form as follows:
602,000,000,000,000,000,000,000.
Q. How many moles are in a zero?
A. We do not know how many moles are in a zero.
Q. What are the groups of numbers separated by commas in a large number called?
A. Each segment of a number between commas (which denote place value) are called periods.
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Notable Birthdays for October 23
Samuel More (1762-1843) - Engineer who was a pioneer in steamships.
John Russell Bartlett (1805-1886) - U.S. Boundary Commissioner responsible for surveying the boundary between the U.S. and Mexico.
Blanchan De Graff Doubleday (1865-1918) - Author and publisher of wild flowers and birds under the name Neltje Blanchan.
John Heisman (1869-1936) - Pioneer in early college football and the person the Heisman Trophy Award is named after.
William D. Coolidge (1873-1975) - Inventor of the modern x-ray tube.
Gilbert N. Lewis (1875-1946) - Chemist who discovered the covalent bond using his own concept (Lewis dot structure) of electron pairs.
Milton "Gummo" Marx (1892-1977) - Comedian with the duo Marx Brothers.
Gertrude Ederle (1905-2003) - First female swimmer to swim the English Channel.
Zellig Harris (1909-1992) - Linguist known for his work in structural linguistics and the discovery of transformational structure in language.
Hayden Rorke (1910-1987) - Actor known for his character Colonel Alfred E. Bellows in I Dream of Genie.
Paul Rudolph (1918-1997) - Architect who designed the Yale Art and Architecture Building.
Bob Montana (1920-1975) - Illustrator and creator of Archie Comics.
Ned Rorem (1923-2022) - Composer said to be one of the leading composers of all time.
Frank Sutton (1923-1974) - Actor who played Gunnery Sergeant Vince Carter on Gomer Pyle.
JacSue Kehoe (1935-2019) - Neuroscientist who discovered a neurotransmitter can have multiple types of receptors.
Ellie Greenwich (1940-2009) - Co-songwriter of Da Doo Ron Ron, Then He Kissed Me, and Leader of the Pack.
Brian Ross (1948-Still Living) - Investigative journalist.
Darrell Pace (1956-Still Living) - Olympic archer.
Dwight Yoakam (1956-Still Living) - Country music singer Little Ways, Turn It On, Turn It Up, Turn Me Loose, and Ain't That Lonely Yet.
Michael Eric Dyson (1958-Still Living) - Activist and author of Making Malcolm: The Myth and Meaning of Malcolm X.
Robert Trujillo (1964-Still Living) - Bassist for the hard rock band Metallica.
Augusten Burroughs (1965-Still Living) - Author of Running with Scissors.
Dale Crover (1967-Still Living) - Former drummer of the band Nirvana.
Chris Horner (1971-Still Living) - Professional road racing cyclist.
Meghan McCain (1984-Still Living) - Journalist, author, and daughter to the late John McCain.
Leah Van Dale (1987-Still Living) - WWE female wrestler named Carmella in the ring.
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Memorable Events for October 23
1850 - The first National Women's Rights Convention begins in Worcester, Massachusetts.
1684 - English King Charles II revokes the Massachusetts Bay Colony charter trading with other countries.
1760 - First Jewish prayer books printed.
1819 - The first ship sails through the Erie Canal to Utica.
1910 - The first woman (Blanche Scott) flies at a public event at Fort Wayne, Indiana.
1915 -The first National Horseshoe Tournament is held at Kellerton, Iowa.
1923 - Babe Ruth makes a postseason exhibition appearance in a rival Giants uniform.
1923 - Sebastian Hinton receives a patent for a playground climbing structure known monkey bars.
1932 - The radio comedy program The Fred Allen Show airs.
1933 - The John Dillinger gang rob t$75,000 from the Central National Bank in Greencastle, Indiana.
1934 - Jean Piccard and Jeanette Ridlen set the record for their hot air balloon flying 10.9 miles over Lake Erie.
1941 - Dumbo is released by Walt Disney.
1945 - Jackie Robinson signs contract with Montreal Royals, the minor league team of Brooklyn Dodgers.
1947 - NAACP submits a petition on racism to the UN entitled An Appeal to the World.
1956 - First video recording on magnetic tape televised across the country.
1964 - Champion boxer Joe Frazier beats German Hans Huber for the Olympic heavyweight gold medal.
1973 - President Nixon turns over White House tape recordings to the judge.
1984 - The Ethiopian famine is aired on NBC via the BBC.
2001 - The iPod is released by Apple.
2007 - Astronaut Pamela Melroy becomes the second female space shuttle commander.
2019 - Google claims it has achieved Quantum Supremacy.
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I have a mole, but I’m not showing you where it is! ;)
And now I want Chicken Mole for supper!
https://www.allrecipes.com/recipe/213733/chicken-mole/
I love Guaca Mole!..................
Avocado’s Number.
I’ve got a mole of moles under my lawn.
You got it!..............
My grandfather used “mole beans” to get rid of moles.
They were actually Castor plant seeds................
wi-fi name in my shop is “avogadro” password: 6.02E+23
pollo con mole? Yum.
Tastes like chicken....................
Tastes like chicken....................
I had a wonderful orange cat named Dominic who tried to celebrate Mole Day EVERY day. He frequently had them for dinner and everything!
He had an early death as he tried to celebrate Automobile Day, unfortunately.
Our cat likes to share her ‘winnings’ with us............
Avocado’s Number:
6.02 x 10^23 guacamoles
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