Element guide
Electron configuration of Vanadium (V)
The electron configuration of Vanadium is 1s2 2s2 2p6 3s2 3p6 3d3 4s2. In shorthand form it is written as [Ar] 3d3 4s2.
Use this page to connect the notation with atomic number 23, the d-block, and the valence pattern 3d3 4s2.
How to write the configuration
Configuration at a glance
Vanadium has atomic number 23, so a neutral atom has 23 electrons. The configuration 1s2 2s2 2p6 3s2 3p6 3d3 4s2 is a compact record of where those electrons sit by subshell.
The shorthand [Ar] 3d3 4s2 replaces the filled inner core with the previous noble gas. That notation keeps attention on the electrons that usually explain bonding, ions, and periodic trends.
Step-by-step filling
After the argon core (18 electrons), 5 more electrons need placement. The 4s subshell receives 2 electrons (4s2) before the 3d subshell starts filling. The remaining 3 electrons go into separate 3d orbitals following Hund's rule, giving each of the five 3d orbitals one unpaired electron each before any pairing begins.
Step-by-step filling walkthrough: 1. Start with atomic number 23. 2. Fill through argon: 1s2 2s2 2p6 3s2 3p6 (18 electrons). 3. Fill 4s2 (20 electrons total). 4. Place 3 electrons in 3d (23 electrons total). 5. Each 3d electron occupies its own orbital (Hund's rule), giving V three unpaired electrons.
Orbital diagram and valence meaning
An orbital diagram turns each subshell into boxes and arrows. V has three unpaired electrons in the 3d subshell, making it strongly paramagnetic. The valence clue for V is 3d3 4s2.
For transition metals, both the 4s and 3d electrons participate in bonding. Vanadium exhibits multiple oxidation states, with +5 being the most common (as in V2O5).
Common mistakes
The first mistake is miscounting: after argon (18), 4s2 (20), 3d3 (23). Verify: the superscripts total 23. The second mistake is underestimating the number of unpaired electrons. With 3d3, all three electrons are unpaired.
A third common error is assuming that V always uses all 5 valence electrons. While V5+ is common, V also forms V4+, V3+, and V2+ compounds.
Vanadium reference table
| Item | Value |
|---|---|
| Atomic number | 23 |
| Full configuration | 1s2 2s2 2p6 3s2 3p6 3d3 4s2 |
| Noble-gas notation | [Ar] 3d3 4s2 |
| Valence clue | 3d3 4s2 |
| Block | d-block |
Use the table as a learning reference, then verify advanced oxidation-state questions with your course material.
Before you submit an answer
- The superscripts add up to 23 for a neutral Vanadium atom.
- The notation follows the filling order used in your course.
- The last occupied subshell matches the periodic-table block.
- Any transition-metal or actinide exception is checked against a reference.
- The shorthand core is a noble gas, not a random previous element.
Common questions
What is the electron configuration of Vanadium?
The neutral Vanadium atom is written as 1s2 2s2 2p6 3s2 3p6 3d3 4s2. The shorthand form is [Ar] 3d3 4s2.
How many valence electrons does Vanadium have?
Start from the outer-shell clue 3d3 4s2. For transition metals, inspect both s and d electrons carefully. Vanadium has 5 valence electrons.
Should I memorize this configuration?
Memorize the filling pattern first. Individual configurations become easier when you can rebuild them from atomic number, noble-gas cores, and periodic-table position.
What are the common oxidation states of Vanadium?
Vanadium is known for having multiple oxidation states: +2, +3, +4, and +5. Each oxidation state has a distinct color in aqueous solution.
Practice nearby concepts
Study notes and practice checks
From answer to understanding
Vanadium is an important industrial metal used in steel alloys and as a catalyst. Its electron configuration [Ar] 3d3 4s2 supports multiple oxidation states, making it chemically versatile.
Practice comparison
Compare Vanadium (V) with Titanium (Ti) and Chromium (Cr). Ti: [Ar] 3d2 4s2, V: [Ar] 3d3 4s2, Cr: [Ar] 3d5 4s1 (exception). Vanadium follows the standard filling pattern while chromium deviates, making V the predictable reference point.
Teacher and self-study notes
Vanadium is an excellent benchmark for the first transition series because it follows the standard Aufbau pattern without exceptions. Use it to contrast with chromium and copper when teaching d-electron exceptions.
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