In chemistry, salts are ionic compounds that result from the neutralization reaction of an acid and a base. They are composed of related numbers of cations and anions so that the product is electrically neutral. These component ions can be inorganic, such as chloride, or organic, such as acetate; and can be monatomic, such as fluoride, or polyatomic, such as sulfate.
There are several varieties of salts. Salts that hydrolyze to produce hydroxide ions when dissolved in water are basic salts, whilst those that hydrolyze to produce hydronium ions in water are acidic salts. Neutral salts are those that are neither acid nor basic salts. Zwitterions contain an anionic centre and a cationic centre in the same molecule, but are not considered to be salts. Examples of zwitterions include amino acids, many metabolites, peptides, and proteins.
Usually, non-dissolved salts at standard temperature and pressure are solid, but there are exceptions.
Molten salts and solutions containing dissolved salts are called electrolytes, as they are able to conduct electricity. ...more on Wikipedia