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 or ion in the gaseous state. The other choices are incorrect. A refers to the energy gained by an ion when it receives an electron. C is incorrect because ionization energy generally increases going from left to right across a period and from bottom to top within a group. D is incorrect because potassium is in Group 1A and has a higher ionization energy than lithium.

Ionization Energy Is ________