Question

NAME THE FOLLOWING
The valency of chlorine in KCl is _________

Answer 1

Answer:

Chlorine (Cl) has an electronic configuration of 2,8,7 and hence requires one electron to complete its outermost shell. Potassium (K) has a configuration of 2,8,8,1 and hence also needs to donate 1 electron to complete its octet. Hence both their Valencies are 1.

Explanation:

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Answer 2

Answer:

KCl is potassium chloride. Potassium is an alkali metal that needs to lose one valence electron to expose a full outer shell. Chloride is a halide that needs to gain one valence electron to fill its outer shell. Potassium will 'donate' an electron to chloride, which results in potassium having a 1+ charge and chloride having a 1- charge. The positive and negative charge attract each other, which creates the ionic bond.