What the heck is an ELEMENT in chemistry?

The video tutorial explains the concept of elements, their definition, and examples like iron. It discusses isotopes, such as carbon-12 and carbon-14, and introduces the periodic table, highlighting atomic numbers and element symbols. The video also covers the abundance of elements like hydrogen and helium in the universe and the common elements in living organisms, such as hydrogen, carbon, nitrogen, and oxygen.

What new insight or understanding did you gain from this video?