Question

chemistry sem 1
2.3.2 quiz: organization and history of the periodic table
question 10 of 10
what period is f (fluorine) in?
a. 17
b. 2
c. 7a
d. 7b

Explanation:

In the periodic table, periods are the horizontal rows. Fluorine has an atomic number of 9 and is located in the second - row (period) of the periodic table.

Answer:

B. 2