Multiple Choice
How many valence electrons does aluminum (Al) have?
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9. Electrons in Atoms and the Periodic Table
Valence Electrons of Elements (Simplified)
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
For a main-group element, how can you determine the number of valence electrons using the periodic table?
A
Use the element’s group number (1–2 give 1–2 valence electrons; 13–18 give 3–8 valence electrons, with helium as an exception having 2).
B
Use the element’s atomic number; the atomic number equals the number of valence electrons.
C
Use the element’s average atomic mass; the atomic mass equals the number of valence electrons.
D
Use the element’s period number; the period number equals the number of valence electrons.
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