📖 what
What is valence electron?
ChemistryPeriodic table
Quick Answer
A valence electron is an electron in the outermost shell of an atom. These electrons mainly control how an element reacts chemically.
The Full Story
Valence electrons are the electrons most involved in bonding and chemical reactions. Atoms tend to gain, lose, or share these electrons to become more stable, often aiming for a full outer shell. Elements in the same group of the periodic table usually have the same number of valence electrons, which is why they behave similarly. For example, the alkali metals each have one valence electron, making them highly reactive. Understanding valence electrons is key to predicting bonds and compound formation.
Key Facts
1.Outer-shell electrons are called valence electrons
2.Group 1 elements usually have 1 valence electron
3.Group 17 elements usually have 7 valence electrons
YouTube Angle
Suggested video title for this topic:
"The outer electrons that decide how atoms react"