The bottom number on each element of the periodic table are called the 4f series or lanthanoids and 5f or actanoids. They are also called inner transition elements.
Salts are compounds that contain positively charged ions and negatively charged ions. That is; they consist of the positive ion of a base and the negative ion of an acid.
Salts may be produced when acids and bases are combined together in equal proportions, a process called neutralization.
During neutralization reactions an acid reacts with a base to form a salt and water as the only products.
