an ion that has both a positive and a negative charge on the same group of atoms.
non-conductor of heat or electricity.
the sum of the relative atomic masses of the elements that make up the molecule.
the nucleus of the new isotope that is formed as a result of radioactive decay.
substances such as elements or compounds, that cannot be broken down into simpler substances by...
an amorphous polymer that changes its shape when stretched, but regains its original shape after...