Question

3 Describe the changes in the appearance of the substances when sodium and chlorine
combine to form sodium chloride? for class 7​

Answer 1

Explanation:

Sodium + Chlorine: When a sodium atom transfers an electron to a chlorine atom forming a sodium cation (Na+) and a chlorine anion (Cl-) both ions have complete valence shells and are energetically more stable . The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat electricity.

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