They are called artificial chemical elements.
Synthetic is the term you are looking for i believe.
Synthetic is the term you are looking for i believe.
Supplementary Angles
synthetic
periodic table of elements
Metal is a general term for the meatallic elements and alloys made of them.
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.
There are 92 elements that exist in nature*. Every heavier element has decayed before our time.Of course, there are more elements in the periodic table, but they are all synthetic elements-they were made in a laboratory. Theoretically, there is no limit on how heavy an element could become-you can always add a proton to the nucleus. However these synthetic elements exist only for a fraction of a second and only in particle accelerators. There are currently 115 known elements, 112 of which have been confirmed and are named (or in the process of being named).*If you extend the term "nature" to other planets and stars, than you will occassionally find more elements.
The another term used is Families. The vertical columns are referred as groups or families.