Multiple Choice
Which term refers to the electrons located in the outermost shell or energy level of an atom?
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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 selenium (Se) have?
A
6
B
2
C
8
D
4
Verified step by step guidance1
Identify the group number of selenium (Se) in the periodic table. Selenium is in group 16 (also known as group VIA).
Recall that elements in group 16 have 6 valence electrons because the group number corresponds to the number of valence electrons for main-group elements.
Understand that valence electrons are the electrons in the outermost shell of an atom that participate in chemical bonding.
Confirm that selenium's electron configuration ends with 4s² 3d¹⁰ 4p⁴, where the 4s and 4p electrons (2 + 4) make up the 6 valence electrons.
Conclude that selenium has 6 valence electrons based on its group number and electron configuration.
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