They are called artificial chemical elements.
Synthetic is the term you are looking for i believe.
Elements that are made in a laboratory are typically referred to as synthetic elements. These elements are not found naturally on Earth and are produced by scientists through various experimental methods. Examples of synthetic elements include einsteinium and seaborgium.
Radioactive elements.
synthetic
Period is the term used in the periodic table to describe each horizontal row of elements.
Metal is a general term for the meatallic elements and alloys made of them.
When two of the same elements are bonded together, it is called a diatomic molecule.
The term used is group. It is also called family.
The term used in Groups. It is sometimes called Family.
A bioprosthetic is another term for a bioprosthesis - a prosthesis made from biological, rather than synthetic material.
The another term used is Families. The vertical columns are referred as groups or families.
The another term used is Families. The vertical columns are referred as groups or families.