Multiple Choice
Which of the following represents the valence electron configuration for a fluorine (F) atom?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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How many valence electrons does bismuth (Bi) have?
A
5
B
3
C
7
D
2
Verified step by step guidance1
Identify the group number of bismuth (Bi) in the periodic table. Bismuth is in group 15 (also known as group VA).
Recall that elements in group 15 have 5 valence electrons because the group number corresponds to the number of valence electrons for main group elements.
Understand that for heavier elements like bismuth, the valence electrons are primarily the electrons in the outermost s and p orbitals, which correspond to the group number.
Recognize that although bismuth is in group 15, it often exhibits a valence of 3 due to the inert pair effect, where the s electrons are less involved in bonding.
Therefore, the number of valence electrons that typically participate in bonding for bismuth is 3, even though it has 5 valence electrons in its outer shell.
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