What is the name for the group of elements indicated by the shaded portion of the periodic table? 
Definitions:
Sleep Disorder
A medical condition that negatively affects a person's sleep patterns, leading to health issues and diminished quality of life.
Symptoms
Signs or manifestations, often physical or mental, indicating the presence of a disease or condition.
Treat
To provide medical care or attention to someone or something with the aim of improving health or alleviating symptoms.
Sociocognitive Theories
Theories that emphasize the role of cognitive processes and social interactions in understanding behavior and mental processes.
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