Valencian Community PAU Chemistry Practice Questions - Valencian Community PAU Chemistry (Química 2o Bachillerato) Exam

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Which of the following correctly orders the period 3 elements Na, Mg, Al, and Si by increasing first ionization energy (IE_1)?

Na < Al < Mg < Si Na < Mg < Al < Si Al < Na < Mg < Si Si < Mg < Al < Na

Correct Answer:

Na < Al < Mg < Si

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