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Periodic Table and Periodicity question

2021 · 16 Mar · Shift 2 · Q10
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Periodic Table and Periodicity question

2021 · 16 Mar · Shift 2 · Q10

JEE MainChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Identify the elements X and Y using the ionisation energy values given below :

Ionization energy (kJ/mol)
1 st{st}st 2 nd{nd}nd
X 495 4563
Y 731 1450
  1. A
    X = F; Y = Mg
  2. B
    X = Mg; Y = F
  3. C
    X = Na; Y = Mg
  4. D
    X = Mg; Y = Na
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