Subject Area - General ChemistryH +, the proton, is a single positively charged atomic nucleus without electrons. Compared to all other ions and compared to atoms, it is vanishingly small. In the aqueous system, the proton is always solvated, i.e. surrounded by water molecules: H ++ H2O → H3O +.
Specialization - Macromolecular ChemistryThe term plastic refers to materials, the main constituents of which are fully or semi-synthetically ("artificially") produced organic macromolecules mixed according to the desired areas of application (blend, compounding).