Multiple Choice
How many p electrons does selenium (Se), atomic number 34, possess in its ground state?
3
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
What is the valence electron configuration for the silicon atom?
A
3s^2 3p^6
B
3s^2 3p^2
C
2s^2 2p^6
D
4s^2 3d^2
Verified step by step guidance1
Recall that the valence electrons are the electrons in the outermost shell (highest principal quantum number, n) of an atom.
Determine the atomic number of silicon, which is 14, meaning it has 14 electrons in total.
Write the full electron configuration for silicon by filling orbitals in order: 1s^2 2s^2 2p^6 3s^2 3p^2.
Identify the valence shell as the third shell (n=3) because it is the highest occupied energy level for silicon.
Extract the valence electron configuration from the outermost shell: 3s^2 3p^2.
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