A measure of how much substance is packed into a space

Question

What is density ? What is mass divided by vol? What is water ? What is element?

Answer 1

Water is both an element and compound.  It is one of the 5 elements in nature.  It is a compound because it is composed of more that one element, 2 atoms of hydrogen and 1 atom of oxygen.  This gives you H₂O.

 

An element is the most basic and fundamental unit of a substance or material.

 

Density is the amount of space that atoms are compacted in a substance.  The closer these atoms are, the more dense and more solid.