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प्रश्न
Differentiate the first twenty elements of the periodic table into metals, non-metals, metalloids and noble gases.
सारिणी
उत्तर
| Metals | Non-metals | Metalloids | Noble gas |
| Lithium (Li) | Hydrogen (H) | Boron (B) | Helium (He) |
| Beryllium (Be) | Carbon (C) | Silicon (Si) | Neon (Ne) |
| Sodium (Na) | Nitrogen (N) | Fluorine (F) | Argon (Ar) |
| Magnesium (Mg) | Oxygen (O) | ||
| Aluminium (Al) | Phosphorus (P) | ||
| Potassium (K) | Sulphur (S) | ||
| Calcium (Ca) | Chlorine (Cl) |
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