<h3>Because it is harmful for school environment.</h3>
Potassium Metal Is Explosive— Do Not Use It! The reaction of sodium with water is a spectacular and essential classroom demonstration. Many teachers want to show also the more violent reaction of potassium. We propose not to do so because explosions can happen even before the metal is in contact with water.
<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>
Molecules of an ideal gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size.
An Insulator.
Insulators prevent flow of electric current. Example is wood, clay.
Nitrogen (around 78%), Oxygen (around 21%), and Argon (around 1%).
Hope this helps :)
