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Question

Few values are given in the table in the direction from left to right and top to bottom. Predict the property which could be depicted in the table.
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A
Atomic number
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B
Ionisation enthalpy
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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
In a period, on moving from left to right, atomic number increases. In a group, on moving from top to bottom, atomic number increases.
In a period, on moving from left to right, ionisation enthalpy increases. In a group, on moving from top to bottom, ionisation enthalpy decreases.
In a period, on moving from left to right, atomic radius decreases. In a group, on moving from top to bottom, atomic radius increases.
In a period, on moving from left to right, electron gain enthalpy increases. In a group, on moving from top to bottom, electron gain enthalpy decreases.

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