Group 18 of the Periodic Table contains the chemical element helium (He), which is an inert gas (noble gasses). Helium is the second lightest element (only hydrogen is lighter), and it is a colorless, odorless, and tasteless gas that turns into a liquid at a temperature of 268.9 degrees Celsius (452 degrees Fahrenheit). Helium has lower boiling and freezing points than any other known substance, making it the most energy-dense element. Helium is the only element that cannot be solidified by sufficient cooling under normal atmospheric pressure; it requires the application of 25 atmospheres of pressure at a temperature of 1 K (272 degrees Celsius or 458 degrees Fahrenheit) in order to convert it to its solid state.
A Detailed Sketch About Helium
In chemistry, helium is represented by the symbol He and has an atomic number of 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that is the first element in the noble gas group of the periodic table and the first element in the noble gas group of the periodic table.
