Multiple Choice
An atom has the electron configuration 1s2 2s2 2p3. How many valence electrons does this atom have?
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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 silicon (Si) atom have?
A
4
B
8
C
6
D
2
Verified step by step guidance1
Identify the group number of silicon (Si) in the periodic table. Silicon is in group 14 (or group IV) of the periodic table.
Recall that the group number for main group elements corresponds to the number of valence electrons for that element.
Since silicon is in group 14, it has 4 valence electrons.
Understand that valence electrons are the electrons in the outermost shell of an atom that participate in chemical bonding.
Therefore, the number of valence electrons in a silicon atom is 4.
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