❓ why
Why are halogens so reactive?
ChemistryPeriodic table
Quick Answer
Halogens react readily because they are one electron short of a full outer shell. That makes them highly likely to form salts and other compounds.
The Full Story
The halogens in Group 17—fluorine, chlorine, bromine, iodine, astatine, and tennessine—have seven valence electrons. They tend to gain one electron to reach a stable noble-gas-like arrangement. This makes them very reactive, especially the lighter halogens such as fluorine and chlorine. Their chemistry is why chlorine is used in disinfectants and why many halogens form salts with metals.
Key Facts
1.Halogens are in Group 17
2.They have 7 valence electrons
3.Chlorine is widely used in disinfection
YouTube Angle
Suggested video title for this topic:
"Why do these elements act like they’re one electron away from a full life?"