Answer
See explanation
Work Step by Step
Correct: "Potassium becomes K+ when it loses an electron."
Correct: "K+ has a noble gas configuration" because after losing its 4s electron, K⁺ has the same electron configuration as argon (Ar), a noble gas.
Incorrect: "The ionization energy for the potassium atom is negative." Ionization energy is always positive because it requires energy to remove an electron from a neutral atom.
The correct version would be: "The ionization energy for the potassium atom is positive, because when K loses an electron to become K+, it achieves a noble gas electron configuration."
