Multiple Choice
Which of the following statements about oxygen is correct?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many valence electrons does a fluorine (F) atom have?
A
8
B
5
C
6
D
7
Verified step by step guidance1
Identify the atomic number of fluorine (F), which is 9. This means fluorine has 9 electrons in total.
Recall that electrons are arranged in energy levels (shells) around the nucleus. The first shell can hold up to 2 electrons, and the second shell can hold up to 8 electrons.
Determine the electron configuration of fluorine: the first shell is filled with 2 electrons, and the remaining electrons go into the second shell.
Since valence electrons are the electrons in the outermost shell, count the electrons in fluorine's second shell.
Conclude that fluorine has 7 valence electrons because it has 7 electrons in its outermost shell.
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