Multiple Choice
Which of the following is the correct electron configuration for zinc (Zn)?
4
views
10. Periodic Properties of the Elements
The Electron Configuration
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which element has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^2?
A
Zinc (Zn)
B
Germanium (Ge)
C
Arsenic (As)
D
Gallium (Ga)
Verified step by step guidance1
Identify the total number of electrons in the given electron configuration: $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{2}$ by adding the superscripts: $2 + 2 + 6 + 2 + 6 + 2 + 10 + 2$.
Sum these numbers to find the atomic number, which corresponds to the number of protons and thus the element's identity.
Recall that the electron configuration is written in order of increasing energy levels and sublevels, following the Aufbau principle, and that the outermost electrons (valence electrons) determine the element's group in the periodic table.
Compare the total number of electrons (atomic number) to the periodic table to find the element with that atomic number.
Confirm that the element with this atomic number matches the given options and select the correct element accordingly.
Related Videos
Related Practice
The Electron Configuration practice set
Problem sets built by lead tutorsExpert video explanations