JEE Main Chemistry question

When the first ionisation energies are plotted against atomic number, the peaks are occupied by

(A)Alkali metals
(B)Halogens
(C)Transition metals
(D)Rare gasesCorrect

Answer: (D)

Solution

Noble (rare) gases have completely filled valence shells, making them exceptionally resistant to electron removal, so they sit at the local maxima (peaks) in a plot of first ionisation energy versus atomic

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Question ID VK-133256