Multiple Choice
Which element has exactly 2 valence electrons and only 1 energy level?
2
views
10. Periodic Properties of the Elements
Valence Electrons of Elements
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many valence electrons does antimony (Sb) have?
A
7
B
3
C
5
D
2
Verified step by step guidance1
Identify the group number of antimony (Sb) in the periodic table. Antimony is in group 15 (or VA) of the periodic table.
Recall that elements in group 15 have 5 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.
Write the electron configuration of antimony to confirm the valence electrons: Sb has the configuration $[\mathrm{Kr}] 4d^{10} 5s^{2} 5p^{3}$, where the 5s and 5p electrons are the valence electrons.
Count the electrons in the outermost shell (5s and 5p orbitals): $2 + 3 = 5$ valence electrons.
2:32mWatch next
Master Main Group Elements Valence Electrons with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Valence Electrons of Elements practice set
Problem sets built by lead tutorsExpert video explanations