Protons have a positive electric charge. Neutrons have no electric charge. The number of protrons equals the number of electrons. A property is a quality or characteristic of matter. A compound is a substance made of two or more elements whose atoms are chemically combined.
Water is a compound whose elemnets are hydrogen and oxygen.
The positive charge of the protons and the negative charge of the electrons are equal in strength. In an atom, the number of negatively charged electrons equals the number of positively charged protons. Thus, atoms are electrically neutral. The parts of the mixture can usually be separated more easily than the elements in a compound. A suspension is a heterogeneous mixture in which the particles of one material are supported in a liquid.