In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is:
A
Ionization enthalpy
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B
Electronegativity
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C
Atomic radius
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D
Electron gain enthalpy
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Solution
The correct option is C
Atomic radius
Solution:
Along the period: As we move along the period, the atomic radius decreases due to an increase in nuclear charge whereas ionization enthalpy, electronegativity, and electron gain enthalpy increase along the period.
Along with the group: As we move along the group, the atomic radius increases with the increase in the number of shells but ionization enthalpy, electronegativity, and electron gain enthalpy decrease.