Question

State why the valency of the metal potassium 1+ and of the non metal chlorine 1-​

Answer 1

this is because potassium is a metal and has 1 more balanced electron and its octate is completed so its valency is +1 but chlorine has 1 less electron in its octate so its valency is -1

Answer 2

Answer:

bcz of their electro negativity...

chlorine is more electro negative than potassium that is the reason for Cl to gain an electron and potassium to lose electron