Question

Which of the following is a product formed when K reacts with Cl2?

KCl
K2Cl
KCl2
K2

Answer 1

The answer is A.
Which is... KCI

Answer 2

Answer: KCl

Explanation: Potassium [K] has an atomic no of 19 and the electronic configuration is:

`K :1s^22s^22p^63s^23p^64s^1` tends to get stable by losing one electron and forming
`K^+`

Chlorine [Cl] has atomic no of 17 and thus the electronic configuration is :

`Cl :1s^22s^22p^63s^23p^5` tends to get stable by gaining one electron and forming
`Cl^-`

`K^+` and
`Cl^-` attract each other and form an ionic bond. As we have a chlorine molecule that is two atoms of chlorine are present, 2 atoms of potassium will react to form 2 moles of KCl.

`2K+Cl_2\rightarrow 2KCl`