Class 9th Chemistry Compounds Name & Formulas

Chapter 1: Matter in Our Surroundings

Compound Name	Formula
Water	H₂O
Ice	H₂O (solid)
Steam	H₂O (gas)
Oxygen	O₂
Nitrogen	N₂
Carbon dioxide	CO₂

Chapter 2: Is Matter Around Us Pure

Compound Name	Formula
Common salt (Sodium chloride)	NaCl
Sugar (Sucrose)	C₁₂H₂₂O₁₁
Copper sulphate	CuSO₄
Potassium permanganate	KMnO₄
Iodine	I₂
Ammonium chloride Calcium carbonate	NH₄Cl CaCO₃

Chapter 3: Atoms and Molecules

Compound Name	Formula
Hydrogen	H₂
Oxygen	O₂
Nitrogen	N₂
Chlorine	Cl₂
Ammonia	NH₃
Methane	CH₄
Carbon monoxide	CO
Carbon dioxide	CO₂

Ion Name	Formula
Sodium ion	Na⁺
Potassium ion	K⁺
Calcium ion	Ca²⁺
Magnesium ion	Mg²⁺
Chloride ion	Cl⁻
Hydroxide ion	OH⁻
Sulphate ion	SO₄²⁻
Carbonate ion	CO₃²⁻
Nitrate ion	NO₃⁻
Ammonium ion	NH₄⁺

Chapter 4: Structure of the Atom

Substance	Formula
Helium	He
Lithium	Li
Beryllium	Be
Boron	B
Carbon	C
Neon	Ne

Chapter 5: The Fundamental Unit of Life

Compound Name	Formula
Glucose	C₆H₁₂O₆
Water	H₂O
Oxygen	O₂
Carbon dioxide	CO₂

Chapter 6: Tissues

Compound Name	Formula
Haemoglobin	C₂₉₅₂H₄₆₆₄O₈₃₂N₈₁₂S₈Fe₄
Water	H₂O

Chapter 12: Improvement in Food Resources

Compound Name	Formula
Urea	CO(NH₂)₂
Ammonium sulphate	(NH₄)₂SO₄
Calcium nitrate	Ca(NO₃)₂
Superphosphate	Ca(H₂PO₄)₂