The basic building block of all compounds is atoms. Compounds contain atoms of at least two different elements bonded to one another. Thus, atoms of elements are what form compounds.
An "Atom" is the basic building block of all molecules [first] and [then] biomolecules.
The basic building block of all matter is the atom.
carbon
An Atom
Carbon
Atom
Cells!
Cells!
well it is all the organs inside you
It could be argued that the most basic building block of the body, as in all other things, is the atom. The answer that you are most likely looking for is the protein.
the cell
The building blocks of all compounds are atoms. Atoms combine together to form molecules, which are the basic units of compounds. The specific arrangement of atoms in a molecule determines the properties and characteristics of the compound.