Compare with cation . An anion is a negatively charged ion. Nonmetals typically form anions. Compare with cathode . The electrode at which oxidation occurs in a cell.
Anions migrate to the anode.
Abbreviated as amu or u . Sometimes called the dalton , after John Dalton , architect of the first modern atomic theory . A tiny, incredibly dense positively charged mass at the heart of the atom. It contains almost all of the mass of the atom but occupies only a tiny fraction of the atom's volume. The number of protons in an atomic nucleus .