How many electrons do k plus have?

Answer 1

Potassium's atomic number is 19. A neutral potassium atom would thus have 19 protons and 19 electrons. We're talking about K+, however, so we need to subtract one electron from this, giving us 18.

Answer 2

An atom of potassium can only have 19 electrons.

Answer 3

Oh my gosh, is that notation still in use? k is equivalent to a principal quantum number of 1, so two electrons.

Answer 4

Potassium has 19 electrons.