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Where are the valence electrons of an atom located?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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How many valence electrons are available for bonding in bromine (Br)?
A
6
B
5
C
8
D
7
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Identify the group number of bromine (Br) in the periodic table. Bromine is in Group 17, which is also known as the halogens group.
Recall that the group number for main-group elements corresponds to the number of valence electrons. For Group 17 elements, the number of valence electrons is 7.
Understand that valence electrons are the electrons in the outermost shell of an atom that are available for bonding.
Confirm that bromine has 7 valence electrons because it needs one more electron to complete its octet, which is typical for halogens.
Therefore, the number of valence electrons available for bonding in bromine is 7.
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