Question
Which element reacts most similarly to chlorine? Why?
A. sulfur because they are both located in the same period
B. fluorine because they both have seven valence electrons
C. sulfur because they both gain two electrons to form anions
D. fluorine because they are both gases at room temperature
A. sulfur because they are both located in the same period
B. fluorine because they both have seven valence electrons
C. sulfur because they both gain two electrons to form anions
D. fluorine because they are both gases at room temperature
Answers
GPT-5 mini
B. Fluorine — both chlorine and fluorine are halogens with seven valence electrons (ns2 np5), so they have very similar chemistry (they tend to gain one electron to form −1 ions).