Canary Islands PAU Chemistry Practice Questions - Canary Islands PAU Chemistry Examination 2026 (Química 2o Bachillerato COPAU) Exam

Which of the following Period 3 elements possesses the highest first ionization energy (I₁)?

Magnesium (Mg) Aluminium (Al) Chlorine (Cl) Sodium (Na)

Correct Answer:

Chlorine (Cl)

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