Chemistry Chapter 5 Exam - Quia
Chemistry Chapter 5 Exam. Multiple ..... To which group do fluorine and chlorine
belong? ... Calcium, atomic number 20, has the electron configuration [Ar] 4s2.
Chemistry Chapter 5 Exam. Multiple ..... To which group do fluorine and chlorine
belong? ... Calcium, atomic number 20, has the electron configuration [Ar] 4s2.