Question

All of these are main group elements on the periodic table EXCEPT: (1 point) Responses Chlorine (Cl) Chlorine (Cl) calcium (Ca) calcium (Ca) Cesium (Cs) Cesium (Cs) Cobalt (Co)

Answer 1

The element that is not a main group element among the options you've provided is **Cobalt (Co)**.

- Chlorine (Cl), Calcium (Ca), and Cesium (Cs) are all main group elements (Group 17, Group 2, and Group 1, respectively).
- Cobalt (Co) is a transition metal, which places it outside of the main group elements.