What is the formula for potassium ion?

Question

What is the formula for potassium ion?

Answer 1

K+( potassium losses one electron when ionized)

Answer 2

K = K+ and e-

Answer 3

I knew it but i forgot >.<

But.. http://www.glossary.oilfield.slb.com/Dis...

Or just google it.

Answer 4

K+

K is potassium. When it becomes ionized, it loses an electron and therefore becomes positive, hence the + sign

Answer 5

K+ has a charge =1

electronic structure of K+  

1s2s2s22p63s23p6