Question

question 1 of 10
what group is f (fluorine) in?
a. 2
b. 17
c. 7b
d. 9

Explanation:

Fluorine (F) is a chemical element. In the modern periodic table, elements are arranged in groups (columns). Fluorine has 7 valence electrons. The groups for main - group elements (Groups 1, 2, and 13 - 18) are numbered based on the number of valence electrons (for Groups 1 - 2, it's the same as the group number; for Groups 13 - 18, the group number is 10 + the number of valence electrons). Since fluorine has 7 valence electrons and is a main - group element, its group number is \(10 + 7=17\).

Answer:

B. 17