Multiple Choice
Which of the following represents the correct electron configuration for the V^{3+} ion?
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 of the following represents the correct electron configuration for a neutral atom of boron?
A
1s^2 2s^2 2p^1
B
1s^2 2s^1 2p^3
C
1s^2 2s^1 2p^2
D
1s^2 2s^2 2p^2
Verified step by step guidance1
Step 1: Identify the atomic number of boron, which tells us the number of electrons in a neutral atom. Boron has an atomic number of 5, so it has 5 electrons.
Step 2: Recall the order in which electron orbitals are filled according to the Aufbau principle: 1s, 2s, then 2p orbitals.
Step 3: Fill the electrons into the orbitals starting from the lowest energy level. The 1s orbital can hold 2 electrons, so fill it completely: $1s^2$.
Step 4: Next, fill the 2s orbital, which can also hold 2 electrons: $2s^2$.
Step 5: Finally, place the remaining electron in the 2p orbital: $2p^1$. Thus, the electron configuration is $1s^2 2s^2 2p^1$.
Related Videos
Related Practice
The Electron Configuration practice set
Problem sets built by lead tutorsExpert video explanations