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- Name: Argon
- Symbol: Ar
- Atomic Number: 18
- Atomic Weight: 39.948 u
- Period: 3
- Group: 18
27 Argon Facts for Kids
- Argon is a chemical element on the periodic table.
- Argon is a colorless, odorless, and tasteless gas.
- The symbol for argon is Ar.
- The atomic number for argon is 18.
- The standard atomic weight of argon is 39.948 u.
- Argon is a gas at room temperature.
- Argon is in the noble gas element category on the periodic table.
- Argon is a period 3 chemical element, which is the third row on the periodic table.
- Argon is a group 18 chemical element, which is the noble gases group.
- Argon is in the p-block on the periodic table of elements.
- The electron configuration for Argon is [Ne] 3s2 3p2.
- The electrons per shell for argon are 2, 8, 8.
- Argon has three stable isotopes.
- The three stable argon isotopes are 36Ar, 38Ar and 40Ar.
- Over 99% of the natural argon found on Earth is 40Ar.
- Argon was predicted to exist in 1785 by English scientist Henry Cavendish.
- Argon was discovered and isolated in 1894 by British scientist John W. Strutt and Scottish chemist William Ramsay.
- Argon is the 3rd most abundant gas found in the Earth’s atmosphere.
- Argon makes up about 0.00015% of the Earth’s crust, making it the most abundant noble gas found in the Earth’s crust.
- Worldwide over 771 million tons of argon gas are produced annually.
- Argon is chemically inert and commonly used to create an inert environment.
- Argon is 38% more dense than air, and even though it’s a non-toxic gas it can cause asphyxiation in an enclosed area.
- Argon’s density can displace oxygen, which makes it a common component in a fire-suppression system.
- Argon’s density makes it a great insulator and is injected in between double pan windows.
- Argon is added into incandescent light bulbs to protect the filament from oxidation.
- Argon’s density can be used in an enclosed environment to prevent decay.
- The original United States Declaration of Independence is stored in a case filled with argon gas to protect it from decay.
Additional Resources on the Chemical Element Argon
- Argon – Learn more about the chemical element argon on the U.S. National Library of Medicine website.
- Argon (Ar) – Discover more facts about argon on the Royal Society of Chemistry website.
- Argon – Wikipedia – Find more argon facts on the Wikipedia website.