What group of elements does the shaded area in the following periodic table indicate? 
Definitions:
Ancient Artifacts
Objects made by humans in ancient times, which are of historical, cultural, or archaeological interest.
Self-Concept
An individual's perception of self, formed through experience and interpretation of one's own actions and how others react to those actions.
Person-Centred Theory
A psychological approach developed by Carl Rogers that emphasizes the importance of seeing a person's world from their own perspective for effective therapy.
Self-Actualisation
Self-actualisation represents the realization or fulfillment of one's talents and potentialities, especially considered as a drive or need present in everyone, marking the pinnacle of psychological development.
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