Write the names and symbols of the two most reactive metals belonging to the Group I of the periodic table. Explain by drawing electronic structure how either one of the two metals reacts with a halogen. With which name is the bond formed between these elements known and what is the class of the compound so formed known? State any four physical properties of such compounds.
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Potassium K and Sodium Na are the two most reactive metals belonging to the group I of the periodic table .
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