chemistry (element table)

• Aluminium : Al Valency: 3
• Argon: Ar valency: 0
• Bromine: Br Valency: 1
• Calcium: Ca valency: 2
• Carbon: C Valency: 2 or 4
• Chlorine: Cl valency: 1
• Copper: Cu valency: 1 or 2
• Fluorine: F valency: 1
• Gold: Au valency: 1 or 3
• Helium: He valency: 0
• Hydrogen: H valency: 1
• Iodine: I valency: 1
• Iron : Fe valency: 2 or 3
• Lead: Pb valency: 2 or 4
• Magnesium: Mg valency: 2
• mercury: Hg valency: 1 or 2
• Neon: Ne valency: 0
• Oxygen: O valency: 2
• Phosphorus : P valency: 3 or 5
• Potassium: K valency: 1
• Sodium: Na valency: 1
• Silver: Ag valency: 1
• Sulfur: S valency: 2 or 4 or 6
• Tin: Sn valency: 2 or 4
• Zinc: Zn valency: 2
• Nitrogen: N Valency: 3