Group 1: Sodium, Potassium, Lithium, Hydrogen, Group 2: Calcium, Magnesium, Beryllium, Strontium, Group 3: Aluminium, Boron, Gallium, Group 4: Carbon, Tin, Silicon, Group 5: Nitrogen, Arsenic, Phosphorus, Group 6: Sulphur, Oxygen, Selenium, Group 7: Bromine, Fluorine, Iodine, Chlorine, Group 8: Krypton, Helium, Neon, Argon,

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