Element Properties
By Name
By Atomic Number
By Density
Melting & Boiling Point
Electron Configuration
Radioactive Elements
Noble & Precious Metals
Periodic Table
Groups
Periodic Table
Alkali Metals
Alkaline Earth Metals
Halogens
Noble (Inert) Gases
Rare Earth Elements
Transition Metals
Metalloids (Semimetals)
Nonmetals
Poor Metals
Materials
Toxic Substances
Semiconductor Materials
Vitamins
Amino Acids
Inventions
& Patents
Reference
|
Noble (Inert) Gases
Chemical Properties, Physical Properties and General Information
Radioactive Natural Element | 
Radioactive Synthetic Element | 
Toxic Element |
|
| Group 18 of the Periodic Table |
| Name | Sym. | No. | Atomic
Weight | Melting
Point | Boiling
Point | Phase | Density | Valence
Electrons | Oxidation
States |
| Helium | He | 2 | 4.002602 | -272.2 °C | -268.93 °C | Gas | 0.1786 g/L | 1s2 | 0 |
| Neon | Ne | 10 | 20.1797 | -248.59 °C | -246.08 °C | Gas | 0.9002 g/L | 2s22p6 | 0 |
| Argon | Ar | 18 | 39.948 | -189.35 °C | -185.85 °C | Gas | 1.784 g/L | 3s23p6 | 0 |
| Krypton | Kr | 36 | 83.798 | -157.36 °C | -153.22 °C | Gas | 3.749 g/L | 4s24p6 | +2 |
| Xenon | Xe | 54 | 131.293 | -111.7 °C | -108.12 °C | Gas | 5.894 g/L | 5s25p6 | 0 |
| Radon | Rn | 86 | 222 | -71.15 °C | -61.85 °C | Gas | 9.73 g/L | 6s26p6 | 0 |
| Ununoctium | Uuo | 118 | 294 | Unknown | Unknown | Gas | Unknown | 7s27p6 | ? 0 |
|
Noble Gases: Group 18 of the periodic table, the most stable due to having the maximum number of valence electrons their outer shell can hold, rarely react with other elements; conduct electricity, odorless, colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment.
|
|
|
Chemistry Quick Facts
