Ionization energy is
A)the energy an ion acquires from an electron.
B)the energy needed to remove the least tightly bound electron.
C)highest for metals in Group 1A (1).
D)higher for potassium than for lithium.
E)None of the above.

Question

Quizplus · Accepted Answer

Ionization energy is the energy required to remove the least tightly bound electron from an atom in the gaseous state. Therefore, choice B is the correct answer. Choice A is incorrect as an ion already has one or more electrons removed. Choice C is incorrect as ionization energy decreases going down the group. Choice D is incorrect as ionization energy generally increases going up a group, so potassium, which is below lithium in Group 1A, should have a higher ionization energy. Choice E is incorrect as B is the correct answer.

Ionization Energy Is