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Home Articles

National Mole Day 2025 – Theme, Logo, Activities, Quiz

by Shibani Ghosh
October 9, 2025
in Articles, Current Affairs, General Knowledge
National Mole Day
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Table of Contents

  • National Mole Day 2025 Date –  October 23
  • National Mole Day
  • What is the Avogadro number?
  • The History & Significance of National Mole Day
  • National Mole Day 2025 Theme
  • National Mole Day Previous Themes
  • National Mole Day 2025 Interesting Facts
  • National Mole Day 2025 Activities, Celebration
  • National Mole Day Foundation
  • National Mole Day Quiz 2025
  • National Mole Day Quiz 2025 PDF

National Mole Day is celebrated every year on October 23rd and is a favorite among chemists, students, and chemistry enthusiasts around the world. This special day honors Avogadro’s number, which is key to understanding the concept of moles in chemistry. Celebrations take place from 6:02 AM to 6:02 PM, reflecting the time written as 6:02 10/23 in the U.S. This number, approximately 6.02×10^23, represents the number of particles (atoms or molecules) in one mole of a substance, making it an essential part of the science. The goal of Mole Day is to spark interest in chemistry through fun activities and events!

National Mole Day 2025 Quiz 

National Mole Day 2025 Date –  October 23

In this article readers can get a glimpse on

  • History and Significance of National Mole Day
  • National Mole Day Theme 2025
  • National Mole Day Quiz

National Mole Day

1: Who was the first woman President of India?

2: Which of the following is the longest river in India?

3: Who is known as the ‘Missile Man of India’?

4: What is the capital of Arunachal Pradesh?

5: Who among the following wrote the book ‘Discovery of India’?

    Fill out the form to see the results



    Ready to see how much you know? Take the challenge!

    Mole Day is celebrated annually on October 23rd, from 6:02 AM to 6:02 PM. This timing reflects the numerical value of Avogadro’s number, approximately 6.02×10^23, which is crucial in chemistry for defining the number of particles in a mole. The date and time come together to create a unique way to engage students and enthusiasts in the wonders of chemistry, fostering a deeper appreciation for the subject through fun activities and learning experiences.

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    What is the Avogadro number?

    Avogadro number is denoted as 6.02×1023 and is defined as the number of particles present in a single mole of any substance. This number or a mole is a basic measuring unit for atoms and molecules discovered by Amedeo Avogadro, an 18th-century Italian scientist.

    The History & Significance of National Mole Day

    The day originated around the 1980s when an article appeared in The Science Teacher. Later, a retired high school chemistry teacher, Maurice Oehler from Wisconsin, USA, drew inspiration from the article and founded the National Mole Day Foundation.

    When written in American format, the day resembles the Avogadro number, which signifies the number of molecules or atoms contained in a mole. The day is a special day for all the people associated with the subject of chemistry. Many activities related to moles and chemistry are conducted to mark this day.

    National Mole Day 2025 Theme

    The official theme for National Mole Day in 2025, as selected by the National Mole Day Foundation (NMDF), is:

    “MOLEassic Park”

    The National Mole Day Foundation selects a new, pun-filled theme each year to help promote interest and creativity in celebrating the chemistry holiday. The theme often inspires the accompanying artwork, songs, and classroom activities for the year.

    Mole Day is celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m. to commemorate Avogadro’s Number (6.02×1023), which is a basic unit of measurement in chemistry called the mole.

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    National Mole Day Previous Themes

    Listed below are the previous year themes of National Mole Day:

    • 1991 – The Mole The Merrier
    • 1992 – Go For The Mole
    • 1993 – Mole Out The Barrel
    • 1994 – An Ace In The Mole
    • 1995 – Moledi Gras
    • 1996 – Molemorial Day
    • 1997 – We Dig Chemistry
    • 1998 – Ride The Molercoaster
    • 1999 – Its A Mole World
    • 2000 – Celebrate The Molennium
    • 2001 – Molar Odyssey
    • 2002 – Molar Reflections
    • 2003 – Rock N’ Mole
    • 2004 – Pi a la Mole
    • 2005 – Moles Go Round
    • 2006 – Mole Madness
    • 2007 – Double Theme
    • 2008 – Mole of Fortune
    • 2009 – Molar Express
    • 2010 – Moles of the Caribbean
    • 2011 – Moles of the Round Table
    • 2012 – Molar Eclipse 
    • 2013 – Animole Kingdom
    • 2014 – Mole-O-Ween
    • 2015 – May The Moles Be With You
    • 2016 – Periodic Table of EleMoleMents
    • 2017 – The MOLEVENGERS
    • 2018 – Moley Potter
    • 2019 – DespicaMOLE Me!
    • 2020 – MOLEzilla
    • 2021 – HaMOLEton
    • 2022 – Finding NeMOLE
    • 2023 – Sherlock Molmes 
    • 2024 – Encantmole 
    • 2025 – Moleassic Park 

    National Mole Day 2025 Interesting Facts

    On Mole Day, let us know more about the timeline from the establishment of the mole as the unit for measurement to other important events related to this day. Try participating in various mole day activities happening near you.

    1. It was in 1811 when Avogadro made the first hypothesis that equal volumes of nitrogen and hydrogen maintained under the same pressure and temperature will have the same molecular count.
    2. The credit for this discovery was awarded to Avogadro only after his death, unfortunately.
    3. In the year 1985, Margaret Christoph, a science teacher from Delaware mentions celebrating a day for chemistry with her students in the month of October. She cites this as a day filled with chemistry-related activities every year.
    4. The celebration was mentioned in an article in “The Science Teacher”.
    5. Inspired by this article, the National Mole Day was started in the year 1991 by another high school teacher of Chemistry, Maurice Oehler.
    6. The National Chemistry Week sponsored by the American Chemical Society also falls in the month of October which has the Mole Day in the week making it an important event for the Chemistry week itself.
    7. In the year 2017, an ode to the franchise of the Avengers Superheroes was created under the name “molEvengers”

    National Mole Day 2025 Activities, Celebration

    There are several ways to celebrate this scientific day.

    • Learn more about molecular science and Avogadro’s number.
    • Exploring the international system of measurement using moles.
    • Test your knowledge of chemistry. Celebrate with other chemists and chemistry students around you.
    • Conduct a mole experiment. While conducting it, see how many puns you can tell.
    • In your classroom, try doing 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.

    National Mole Day Foundation

    The National Mole Day Foundation is a non-profit facilitated by current and former chemistry teachers. Their main goal is to continue to spark enthusiasm in students, teachers, and chemistry enthusiasts! They tackle that endeavour by:

    1. Select a yearly theme for mole day with an accompanying song and artwork.
    2. Providing classroom resources for teachers
    3. Highlighting student and teacher work
    4. Financially supporting teachers for professional development and mole day celebrations

    National Mole Day Quiz 2025

    1. What is the main purpose of National Mole Day?

    A) To celebrate animal moles
    B) To promote interest in chemistry
    C) To honor Avogadro’s birthday

    Ans: B)

    2. When is National Mole Day celebrated each year?

    A) October 13
    B) October 23
    C) November 3

    Ans: B)

    3. Between what times is National Mole Day observed?

    A) 5:00 AM to 5:00 PM
    B) 6:02 AM to 6:02 PM
    C) 10:00 AM to 10:00 PM

    Ans: B)

    4. What scientific constant is National Mole Day based on?

    A) Avogadro’s number
    B) Planck’s constant
    C) Speed of light

    Ans: A)

    5. What is the value of Avogadro’s number?

    A) 3.14 × 10²³
    B) 6.02 × 10²³
    C) 9.81 × 10²³

    Ans: B)

    6. Who introduced the concept behind Avogadro’s number?

    A) Amedeo Avogadro
    B) Isaac Newton
    C) Albert Einstein

    Ans: A)

    7. In which field is Avogadro’s number most important?

    A) Physics
    B) Chemistry
    C) Astronomy

    Ans: B)

    8. What does one mole of any substance represent?

    A) 6.02 × 10²³ particles of that substance
    B) One gram of the substance
    C) One liter of the substance

    Ans: A)

    9. National Mole Day often coincides with which event?

    A) Science Fair Week
    B) National Chemistry Week
    C) Earth Day

    Ans: B)
    Want More Engaging Questions?

    Download our FREE PDF packed with insightful quiz questions to test your knowledge!

    🔽 Click below to get your free copy now! 🔽

    National Mole Day Quiz 2025 PDF

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      National Mole Day is more than just a fun celebration; it is an educational event that connects students with fundamental chemistry concepts. By focusing on Avogadro’s number and the mole, it makes abstract scientific ideas tangible and easy to understand. Schools and educators use the day to engage students through creative activities, experiments, and quizzes, fostering a love for science. The clever use of date and time symbolism also helps learners remember key chemistry facts in an enjoyable way.

      Moreover, National Mole Day inspires curiosity and interest in STEM fields beyond the classroom. It encourages students to explore chemical reactions, molecular structures, and scientific problem-solving. Through humor, creativity, and interactive learning, the day makes science accessible to everyone. Ultimately, it helps build a foundation for future scientists while celebrating the legacy of Amedeo Avogadro.

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      Frequently Asked Questions

      What is National Mole Day and why is it celebrated?

      National Mole Day is a fun science event celebrated on October 23. It honors Avogadro’s number, 6.02 × 10²³, which defines a mole in chemistry. The celebration promotes interest in chemistry among students and the public. It runs from 6:02 AM to 6:02 PM, matching the digits of Avogadro’s number. The day aims to make learning chemistry enjoyable and memorable.

      Who introduced the concept of the mole in chemistry?

      The mole concept was introduced by Italian scientist Amedeo Avogadro. He proposed that equal volumes of gases contain the same number of particles under similar conditions. His work later led to the calculation of Avogadro’s number. This idea became a cornerstone in chemical measurement and stoichiometry. National Mole Day celebrates his contribution to science and learning.

      What does one mole represent in chemistry?

      One mole represents 6.02 × 10²³ particles, such as atoms or molecules, of a substance. It helps chemists count and compare quantities at the molecular level. The mole connects the microscopic world to measurable quantities in labs. For example, one mole of water has 6.02 × 10²³ water molecules. This concept simplifies chemical equations and reactions.

      When is National Mole Day celebrated and why that date?

      National Mole Day is celebrated on October 23 each year. The date represents the number 10²³, from Avogadro’s constant 6.02 × 10²³. It is celebrated from 6:02 AM to 6:02 PM, again referencing the number. The timing symbolizes the importance of Avogadro’s number in chemistry. This clever date choice makes the scientific concept easier to remember.

      How do schools and students celebrate National Mole Day?

      Schools celebrate National Mole Day with creative science-themed activities and experiments. Students make mole-themed crafts, songs, and posters. Chemistry teachers often organize quizzes, lab demonstrations, or “mole cakes.” Many schools also hold Mole Day contests and decorate classrooms with chemistry humor. These activities make science interactive and fun for learners.

      What is Avogadro’s number and why is it significant?

      Avogadro’s number is 6.02 × 10²³, representing the number of particles in one mole. It allows chemists to count microscopic particles using measurable amounts. This number is key for chemical calculations and conversions. It bridges the gap between atoms and grams in practical experiments. Understanding it helps students grasp the scale of matter.

      How did National Mole Day begin?

      National Mole Day started in the 1980s to promote chemistry awareness. Inspired by Avogadro’s number, chemistry teachers wanted to make science fun. The idea was later formalized by the National Mole Day Foundation in the United States. Since then, many schools and organizations worldwide have joined the celebration. It remains a popular way to inspire interest in chemistry education.

      What is the National Mole Day Foundation?

      The National Mole Day Foundation (NMDF) was established in 1991 in the U.S. It supports teachers and students celebrating chemistry through Mole Day events. The foundation encourages creative participation through contests and activities. It also provides educational resources to promote chemistry learning. The NMDF’s mission is to keep chemistry exciting and accessible to all.

      What are some common symbols or puns used on Mole Day?

      Mole Day celebrations often feature puns on the word “mole.” Examples include “GuacaMOLE,” “MOLEcules,” and “MOLE-tastic Day.” The mole is sometimes illustrated as a small animal wearing chemistry gear. Students create funny posters combining chemistry concepts with mole humor. These lighthearted elements make science approachable and memorable.

      How does National Mole Day inspire interest in STEM fields?

      National Mole Day makes chemistry engaging through creativity and fun. It helps students see science as enjoyable rather than intimidating. Participating in Mole Day builds curiosity about how substances interact. This curiosity often leads to deeper interest in chemistry and other STEM subjects. The event fosters learning, teamwork, and a lifelong appreciation for science.

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      Shibani Ghosh

      Pouring out my thoughts through words!

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