Which of the following is a chalcogen?
Chalcogens are group 16 elements. Te (group 16) is a chalcogen, while As (group 15), Br (group 17), and Ge (group 14) are not.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Nomenclature of Elements with Atomic Number >100