Multiple Choice
How many valence electrons does an arsenic (As) 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 are available for bonding in silicon?
A
fourteen
B
four
C
eight
D
five
Verified step by step guidance1
Identify the element in question, which is silicon (Si).
Determine the atomic number of silicon, which is 14, meaning it has 14 electrons in total.
Recall that valence electrons are the electrons in the outermost shell of an atom that are available for bonding.
Write the electron configuration of silicon: $1s^2 2s^2 2p^6 3s^2 3p^2$.
Count the electrons in the outermost shell (the third shell), which are the $3s^2$ and $3p^2$ electrons, totaling 4 valence electrons available for bonding.
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