Avogadro Day


Join the celebrations
and commemorate
Avogadro's number
Mole Day
every 23 October

What did Avogadro put into the pockets of his tweed suit? Can you name two movies that Avogadro really liked? What was Avogadro's best day in golf? How did Avogadro send a secret message with his walkie-talkie? What is Avogadro's favorite kind of music? Which Walt Disney characters was Avogadro fond of? Nov 10, 2016 - Explore Shelly Sinar's board 'Happy Mole Day Avogadro' on Pinterest. See more ideas about mole day, mole, teaching chemistry. Mole Day - Avogadro's Number. Search this site. Happy Mole Day!! Celebrations of Mole Day. Additional Pages.

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The Avogadro constant is named after the Italian scientist Amedeo Avogadro (1776–1856), who, in 1811, first proposed that the volume of a gas (at a given pressure and temperature) is proportional to the number of atoms or molecules regardless of the nature of the gas. The first Avogadro Project was a hyperbolic reflection of the canvas with an overlay of CtrlZ and his family. This project was kept up-to-date manually by irregularly taking snapshots of the canvas, and using it as a texture map in a 3D graphics program.

Each year on 23 October the Mole Day celebrations begin at 6.02am and finish at 6.20pm the next day!

Precise, huh? Well that’s because this all-important day has nothing to do with the animal, but commemorates Avogadro’s number (6.02 x 10 23) – a unit of measurement in chemistry.

Does the word molecule ring a bell? The word mole comes from the word and if you’re like me and feeling a bit rusty since chemistry class, then an explanation will go a long way!

Avogadro's Number Mole Day

One mole is a mass – and the number of that mass is equal to the atomic mass of the molecule. So if we take an atom of neon – which has an atomic mass of 20, what will one mole equal? 20 grams of course!

The National Mole Foundation think it’s important to recognise the discovery by Amadeo Avogadro who didn’t receive recognition until after his death! The foundation also wants to raise awareness of chemistry. They want to get students and as many people as possible feeling enthusiastic about the subject!

This year’s theme will be: ‘Moley Potter’. So, will you pledge allegiance to the mole? Why not visit the Mole Day website for all the information you need about what’s happening this year.

In the meantime you could start planning your own mole-like activity. You could plan out a scavenger hunt, write a mole day song or plan some mole jokes to drop into conversation throughout the day. What is Avogadros favourite music? ‘Rock ‘n Mole’! What line from Shakespeare do high school moles have to memorize? ‘To mole or not to mole that is the question.’ You get the picture …

And just because the mole in question is about chemistry doesn’t mean you can’t use real live moles for inspiration! Organise your event and then dress as a mole. Who can come up with the best outfit? The race is on!

Written by: Science Made Fun! on October 23, 2013 @ 4:49 pm

Today, October 23 (or 10/23, as it’s written the American way), from 6:02 am to 6:02 pm, is Mole Day. No, it’s not a day for freckles, spies, Mexican sauce, or cute little burrowing mammals. Rather it’s the day to celebrate the chemical unit the “mole.”

What is a mole, you ask, having forgotten high school chemistry. A mole of something is 6.02 x 10^23 of it (kind of like a dozen of eggs is 12 eggs, a mole of eggs is 602,000,000,000,000,000,000,000 eggs*.)

*okay, technically, it’s 602,214,129,270,000,000,000,000 eggs (give or take a few quintillion – scientists can’t agree on the exact number).

So, with that out of the way, here are 5 fun facts about the mole and Mole Day:

1. The mole is attributed to 18th century Italian scientist Amedeo Avogadro, whose full name is Lorenzo Romano Amedeo Carlo Avogadro di Queregna e di Cerreto. Man, that’s a long name, but it somehow fits the long number that now bears his name (6.02 x 10^23 is called Avogadro’s Constant). His parents called him Amedeo Carlo Avogadro.

We won’t get into the technical aspects, but in 1811 Avogadro proposed a law (now known as Avogadro’s Law) stating that equal volume of all gasses, at the same temperature and pressure, have the same number of molecules.

As with many scientific accomplishments of that age, Avogadro’s findings were promptly ignored. It took about a hundred years for the scientific community to get around to appreciating what he’s done. In 1909, French chemist and Nobel laureate Jean Baptiste Perrin proposed that quantity of molecules be called “Avogadro’s Constant.”


2. Mole Day was proposed in an article in The Science Teacher in early 1980s. Inspired by the article, Maurice Oehler, a chemistry teacher (now retired) in Prairie du Chien, Wisconsin, created the National Mole Day Foundation in 1991.

3. Did you know that the Mole Day has annual themes? Here they are:

1991The Mole The Merrier
1992Go For The Mole
1993Mole Out The Barrel
1994An Ace in The Mole
1995Moledi Gras
1996Molemorial Day
1997We Dig Chemistry
1998Ride the Molercoaster
1999It’s A MOLE World
2000Celebrate the Molennium
2001Molar Odyssey
2002Molar Reflections
2003Rock ‘n Mole
2004Pi a la MOLE
2006Mole Madness
2007Secret Agent Double Mole Seven in Moles are Forever
2008Remember the Alamole
2009Molar Express
2010Moles of the Round Table
2011Molar Eclipse
2012Animole Kingdom

4. To help you celebrate, here’s the Molemorial Day song by Michael Offutt (that’s the theme of the Mole Day in 1996, when Offutt recorded the song). Actually Offutt created a whole album, titled “Molennium,” filled with songs about the mole.

5. As you can probably guess, a mole (6.02 x 10^23) is a VERY large number. But, what does a mole of moles look like? What if we release a mole of moles onto our planet? xkcd explains:

An eastern mole (Scalopus aquaticus) weighs about 75 grams, which means a mole of moles weighs (6.022×10^23)×75g≈4.52×10^22kg.

That’s a little over half the mass of our moon.

Mammals are largely water. A kilogram of water takes up a liter of volume, so if the moles weigh 4.52×10^22 kilograms, they take up about 4.52×10^22 liters of volume. You might notice that we’re ignoring the pockets of space between the moles. In a moment, you’ll see why.

The cube root of 4.52×10^22 liters is 3,562 kilometers, which means we’re talking about a sphere with a radius of 2,210 kilometers, or a cube 2,213 miles on each edge. (That’s a neat coincidence I’ve never noticed before—a cubic mile happens to be almost exactly 4/3pi cubic kilometers, so a sphere with a radius of X kilometers has the same volume as a cube that’s X miles on each side.)

If these moles were released onto the Earth’s surface, they’d fill it up to 80 kilometers deep—just about to the (former) edge of space:

Tags: avogadro's law, Elementary Science, fun facts for mole day, fun science, fun science holidays, fun science of mole, fun science of mole day, high touch high tech, mole day, national mole day, october 23rd, science fun, science holiday, science made fun

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