Element
Electron Arrangement
Number of Valence Electrons
Hydrogen
1
Helium
2.1
Beryllium
Boron
2.3
4
2.5
6
Fluorine
Neon
Sodium
Magnesium
Aluminium
Silicone
Phosphorus
Sulfur
Chlorine
Argon
2.8.8.1
Calcium
Evaluate your academic performance through detailed report