It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, but carbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
hopefully that helps
There’s 1024 atoms of sodium in 2 moles of sodium
What cause the heat we feel on a hot, sunny day is UV Rays my mans
Answer:
The less mass in a given volume of air the less dense the air is going to be.
