chalcogen
/ˈkælkədʒən/
noun
- Any of the chemical elements in Group 16 of the periodic table, including oxygen, sulfur, selenium, tellurium, and polonium.
- Oxygen is the most common chalcogen in Earth's atmosphere.
- The properties of each chalcogen change as you move down the group.
- In chemistry class, we learned that sulfur is a chalcogen found in many minerals.