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# How Many Valence Electrons Does A…

### How to Find Valence Electrons

In chemistry, valence electrons are the electrons that are located in the outermost electron shell of an element. Knowing how to find the number of valence electrons in a particular atom is an important skill for chemists because this...

### How many valence electrons does an antimony (... | Clutch Prep

Related Practice Problems

Write the electron configuration of Co3+ (Cobalt 3+ ion). Explain.

Give the actual ground-state electron configuration for copper (Cu).

Give the full electron configuration for sodium (Na).

Write the full electron configuration of chlorine.

Write the noble gas electron configuration for chlorine.

### SparkNotes: Atomic Structure: Electron Configuration and Valence Electrons

Electron Configuration

The electrons in an atom fill up its atomic orbitals according to the Aufbau Principle; "Aufbau," in German, means "building up." The Aufbau Principle, which incorporates the Pauli Exclusion Principle and Hund's Rule prescribes a few simple rules to determine the order in which electrons fill atomic orbitals:

### Lewis Structures Chemistry Tutorial

1. Main group elements are Group 1 (IA or alkali metals), Group 2 (IIA or alkaline earth metals), Group 13 (IIIA), Group 14 (IVa), Group 15 (VA), Group 16 (VIA or chalcogens), Group 17 (VIIA or halogens) and Group 18 (0 or VIIIA, or Noble Gases or Inert Gases).
The following discussion will not refer to transition metals, lanthanoids (lanthanides) or actinoids (actinides).

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