Give the names and symbols of the first twenty elements of the periodic table. Differentiate them into metals, non-metals, metalloids and noble gases.
| Metals | Metalloids | Non-metals | Noble gases. | | Lithium-Li | Boron B | Carbon-C | Helium-He | | Beryllium-Be | Silicon Si | Nitrogen-N | Neon-Ne | | Sodium-Na | | Oxygen-N | Argon-Ar | | Magnesium-Mg | | Fluorine-F | | | Aluminium-Al | | Phosphorus-P | | | Potassium-K | | Sulphur-* | | | Calcium-Ca | | Chlorine-Cl | | | Scandium-Sc | | | | | Titanium-Ti | | | |
