Multiple Choice
Why are only valence electrons, and not core electrons, typically involved in chemical bonding?
35
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 are in a nitrogen (N) atom?
A
3
B
7
C
8
D
5
Verified step by step guidance1
Identify the atomic number of nitrogen (N), which is 7. This means nitrogen has 7 electrons in total.
Recall that valence electrons are the electrons in the outermost shell (energy level) of an atom.
Determine the electron configuration of nitrogen: \$1s^2 2s^2 2p^3$.
Recognize that the first shell (1s) is the inner shell and the second shell (2s and 2p) is the outermost shell for nitrogen.
Count the electrons in the outermost shell: \$2s^2\( has 2 electrons and \)2p^3$ has 3 electrons, so total valence electrons = 2 + 3 = 5.
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