The noble gases comprise a group of six elements represented in Group 8A of the Periodic Table of Elements. Noble gases have similar chemical properties: they are generally stable, nonreactive and rarely found in combination with other elements. Helium, neon, argon, krypton, xenon and radon make up the noble gas group.
Helium is the first noble gas in Group 8A of the Periodic Table of Elements. Its atomic number is 2, equal to the number of protons in its nucleus, and its atomic mass is 4.003, which represents the weighted mean of an average helium atom. Helium is the lightest noble gas and is often used to fill balloons and blimps.
Neon is the second noble gas represented in Group 8A. Its atomic number is 10 and its atomic mass is 20.18. Neon is the second lightest noble gas. Neon is commonly used to fill lighting tubes.
Argon is the third noble gas in Group 8A's column. Its atomic number is 18 and its atomic mass is 39.95. Argon is the third lightest noble gas. Argon is used to fill lighting tubes and as an inert gas in metallurgical operations.
Helium Fun Facts
Helium is not only the lightest noble gas, it also has the lowest boiling point of all substances, minus 268.9 Celsius, and is the second most abundant element in the universe after hydrogen.
- "General, Organic, and Biological Chemistry"; Karen Timberlake; 2007
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