January 2020 NY Regents Chemistry Exam
6 Which element requires the least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state? (1) Na
(2) Ar
(3) P
(4) Cl
Solution: Ionization energy is the amount of energy needed to remove the most loosely held electron from a gaseous atom in the ground state. We can look at the ionization values on Table S for each element.
Answer: 1
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