Question

odd one out giving reason of iron, Potassium, Sulphur, copper

Answer 1

Answer: Sulphur

Explanation:

Electronic Configuration of these elements are,

I - 2,8,14,2

K - 2,8,8,1

S - 2,8,6

Cu- 2,8,18,1

In the above elements, by observing the number of electrons in the last shells we can say that while ionisation,

Iron, Pottasium and Copper will lose electrons, while Sulphur will gain electrons.