STANDARDChemistry-Periodic Table
STANDARD Chemistry Ionization Energy MCQ Question
Type: MCQ-conceptual-Medium
Identify the elements X and Y using the ionization energy values given below
Ionization energy (kJ/mol) 1st: X = 495, Y = 731 2nd: X = 4563, Y = 1450
A
X = Na; Y = Mg
B
X = Mg; Y = F
C
X = Mg; Y = Na
D
X = F; Y = Mg
Correct Answer
Option A
Detailed Explanation
Na → [Ne]3s¹ IE₁ is very low but IE₂ is very high due to stable noble gas configuration of Na⁺. Mg → [Ne]3s² IE₁ and IE₂ → low IE₃ is very high.
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