The term with this definition is an element.
At this moment, there are 118 elements, 94 of which occur naturally, whereas the remaining 24 are synthetically created. Some of those elements include iron, oxygen, potassium, nitrogen, etc., all of which have unique chemical properties.
Explanation:
if we fix the temperature, we are just left with PV = constant for the gas law. So, in this situation, if the volume is doubled, the pressure must go down by one-half. And vice-versa. The simplest illustration of this would be a cylinder with a plunger on one end: if you push the plunger in so that the volume of the cylinder is halved and the temperature remains constant, then the pressure will double.
Oxygen cannot be broken down into a simpler substance by using chemicals :) Hope this helps and the other answer gets removed :)
It forms magnesium nitride
