Use the information extracted from the periodic table in Figure 2.2 to answer the following questions.

-Fluorine has an atomic number of 9 and a mass number of 19. How many electrons are needed to complete the valence shell of a fluorine atom?

Question

Use the information extracted from the periodic table in Figure 2.2 to answer the following questions.

-Fluorine has an atomic number of 9 and a mass number of 19. How many electrons are needed to complete the valence shell of a fluorine atom?

Quizplus · Accepted Answer

Fluorine has 9 protons and 10 neutrons in the nucleus, which means it has 9 electrons in its neutral state. The electronic configuration of Fluorine is 1s² 2s² 2p⁵. Fluorine requires one electron to complete its valence shell, which is the 2p subshell, and ends up with 8 electrons in its valence shell. Therefore, one electron is needed to complete the valence shell of a Fluorine atom.

Use the Information Extracted from the Periodic Table in Figure