Study sheet: First 30 Elements and Compounds

📋 Course Outline

1. First Thirty Chemical Elements
2. Compounds Used in Daily Life

📖 1. First Thirty Chemical Elements

📝 Essential Points

• The first 30 chemical elements, in atomic-number order, are 1 H–Hydrogen, 2 He–Helium, 3 Li–Lithium, 4 Be–Beryllium, 5 B–Boron, 6 C–Carbon, 7 N–Nitrogen, 8 O–Oxygen, 9 F–Fluorine, 10 Ne–Neon, 11 Na–Sodium, 12 Mg–Magnesium, 13 Al–Aluminium, 14 Si–Silicon, 15 P–Phosphorus, 16 S–Sulfur, 17 Cl–Chlorine, 18 Ar–Argon, 19 K–Potassium, 20 Ca–Calcium, 21 Sc–Scandium, 22 Ti–Titanium, 23 V–Vanadium, 24 Cr–Chromium, 25 Mn–Manganese, 26 Fe–Iron, 27 Co–Cobalt, 28 Ni–Nickel, 29 Cu–Copper, and 30 Zn–Zinc.

💡 Memory Hook

H → He → Li → Be → B → C → N → O → F → Ne, then Na through Zn

📖 2. Compounds Used in Daily Life

★ Must-know

• The daily-life compounds listed are H2O, dihydrogen monoxide or water; NH3, ammonia; NaCl, sodium chloride or table salt; NaOH, sodium hydroxide or caustic soda; HCl, hydrogen chloride or muriatic acid; Ca(OH)2, calcium hydroxide or slaked lime; H2SO4, sulfuric acid or oil of vitriol; NaHCO3, sodium bicarbonate or baking soda; HNO3, nitric acid or aqua fortis; CaCO3, calcium carbonate or limestone; CH3COOH, acetic acid or vinegar acid; CO2, carbon dioxide; CO, carbon monoxide or stove poison; C6H12O6, glucose; and NaClO, sodium hypochlorite or bleach.

Further detail

📌 CO is carbon monoxide, identified in the course as stove poison, whereas CO2 is carbon dioxide.