Radioisotopes are not salts but salts may contain radioisotopes.
Salts contain cations and anions.
Practically all salts contain a metal; exceptions, for example, are ammonium salts.
Salts are salts and bases are another class of compounds: they contain the anion OH-.
Yes, soils contain salts.
Only some salts have hydrates, not all. These salts contain in the formula water of crystallization.
Coke is coal.
Pure Epsom salts do not contain any lead. Since Epsom salts are magnesium sulfate, they contain only magnesium, sulfur, and oxygen.
Yes, salts contain an anion and a cation.
Coal is a rock which does contain molecules.
Metal salts that contain no carbon except as carbonate/bicarbonate.
Salts can contain the majority of the elements from the periodic table of Mendeleev.