Write the names and symbols of two very reactive metals belonging to group 1 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.

The two very reactive metals are sodium (Na) and Potassium(K) belonging to group 1 of the Periodic Table.

Sodium is a reactive metal, it react with halogen to form an ionic chloride called sodium chloride.



The bond formed in this compound is ionic bond and the compound is called as ionic compound.


The physical properties of Ionic Compounds are:-


(i) These compounds are hard and brittle.


(ii) They can conduct electricity


(iii) The melting and boiling point of this compound is high.


(iv) Most of the ionic compound are soluble in water.


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