How to determine valence electrons?
Understand the Problem
The question is asking how to identify the number of valence electrons for an element, which involves understanding the electron configuration of the element and identifying the electrons in the outermost shell.
Answer
Refer to the periodic table and the group number or use the electron configuration.
To determine the number of valence electrons, locate the element on the periodic table and refer to its group number for main group elements. For transition metals, consult the electron configuration.
Answer for screen readers
To determine the number of valence electrons, locate the element on the periodic table and refer to its group number for main group elements. For transition metals, consult the electron configuration.
More Information
Valence electrons determine the chemical properties and reactivity of elements.
Tips
A common mistake is confusing the group number for transition metals. Always verify with the electron configuration.
Sources
- Valence Electrons - Chemistry LibreTexts - chem.libretexts.org
- Periodic Table Groups - Royal Society of Chemistry - rsc.org
