The smallest unit of matter that has all the properties of an element

I believe the term is Atom

Hey there.

Your answer is Atom. An atom is the smallest unit of an element that still carries the same properties of that substance to which in most cases, an atom consists of a proton, a neutron and an electron.

Hope this helps you!

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint