Multiple Choice
Which metalloid has three valence electrons?
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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 lithium (Li) have available for bonding?
A
1
B
2
C
4
D
3
Verified step by step guidance1
Identify the element in question, which is lithium (Li).
Determine the atomic number of lithium, which is 3, meaning it has 3 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 lithium: $1s^2 2s^1$, where the first shell (1s) is full with 2 electrons and the second shell (2s) has 1 electron.
Conclude that the number of valence electrons is the number of electrons in the outermost shell, which is 1 for lithium.
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