Man-made elements: Man-made elements are those elements that do not occur naturally but are produced in the laboratory.
Another wordard, Those material which are made in laboratory are called Man-made elements.
There are 24 man-made elements that were synthesized in the laboratory and find place in the periodic table.
They are unstable and radioactive in nature. Examples include Darmstadtium, Technetium etc.
Final Answer:
Those material which are made in laboratory are called Man-made elements.