| Element or Compound | Symbol or Formula | Type of Element | Physical State | Melting Point (K) | Chemical Reactivity | Key Applications | Source |
|---|---|---|---|---|---|---|---|
| Sodium Chloride | $NaCl$ | Ionic Compound | Solid | 1074 | Soluble in water; conducts electricity in molten or solution state | Industrial processes | 1 |
| Calcium Chloride | $CaCl_{2}$ | Ionic Compound | Solid | 1045 | High melting point; anhydrous form absorbs moisture | Drying agent (moisture absorption) | 1 |
| Magnesium Chloride | $MgCl_{2}$ | Ionic Compound | Solid | 981 | Conducts electricity in molten state | Extraction of Magnesium | 1 |
| Lithium Chloride | $LiCl$ | Ionic Compound | Solid | 887 | Soluble in water; high melting point | Not in source | 1 |
| Calcium Oxide | $CaO$ | Ionic Compound | Solid | 2850 | Very high melting point | Not in source | 1 |
| Iron | $Fe$ | Metal | Solid | Not in source | Does not burn on heating; reacts with steam to form oxide; reacts with dilute acids to evolve $H_{2}$ | Railway tracks, machine parts, cooking vessels | 1 |
| Copper | $Cu$ | Metal | Solid | Not in source | Combines with oxygen to form black $CuO$ ; does not react with water or dilute $HCl$ | Cooking vessels, electrical wiring, jewellery | 1 |
| Aluminium | $Al$ | Metal | Solid | Not in source | Forms amphoteric oxide ( $Al_{2}O_{3}$ ); reacts with steam and dilute acids | Cooking utensils, aircraft parts, anodised articles | 1 |
| Gold | $Au$ | Metal | Solid | Not in source | Does not react with oxygen or water; dissolves in aqua regia | Jewellery, ornaments | 1 |
| Silver | $Ag$ | Metal | Solid | Not in source | Does not react with oxygen; reacts with sulphur in air to form black coating | Jewellery, ornaments | 1 |
| Mercury | $Hg$ | Metal | Liquid | Not in source | Poor conductor of heat; oxide reduced by heating alone | Amalgams | 1 |
| Lead | $Pb$ | Metal | Solid | Not in source | Poor conductor of heat; does not react with water | Soldering (as alloy) | 1 |
| Sodium | $Na$ | Metal | Solid | Low (not specified) | Vigorous reaction with oxygen and cold water (catches fire) | Not in source | 1 |
| Magnesium | $Mg$ | Metal | Solid | Not in source | Burns with dazzling white flame; reacts with hot water and reacts vigorously with dilute $HCl$ | Not in source | 1 |
| Carbon (Diamond) | $C$ | Non-metal | Solid | Very high | Reacts with oxygen to form acidic or neutral oxides | Not in source | 1 |
| Carbon (Graphite) | $C$ | Non-metal | Solid | Not in source | Conducts electricity | Not in source | 1 |
| Gallium | $Ga$ | Metal | Solid | Very low (melts on palm) | Not in source | Not in source | 1 |
| Caesium | $Cs$ | Metal | Solid | Very low (melts on palm) | Not in source | Not in source | 1 |
| Bromine | $Br$ | Non-metal | Liquid | Not in source | Not in source | Not in source | 1 |
Welcome to our diverse and dynamic course catalog.
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