Which statement best describes the arrangement of electrons in an atom of fluorine (F)?

Question

(1 point)
There are five electrons in the first energy level and two electrons in the second energy level.
There are two electrons in the first energy level and seven electrons in the second energy level.
There are seven electrons in the first energy level and two electrons in the second energy level.
There are two electrons in the first energy level and five electrons in the second energy level.

Answer 1

The correct statement that best describes the arrangement of electrons in an atom of fluorine (F) is:

There are two electrons in the first energy level and seven electrons in the second energy level.

Fluorine has an atomic number of 9, which means it has 9 electrons. The electron configuration is 1s² 2s² 2p⁵, where:

• The first energy level (n=1) contains 2 electrons (1s²).
• The second energy level (n=2) contains 7 electrons (2s² 2p⁵).