Few values are given in the table in the direction from left to right and top to bottom predit the property which could be depicted in the table.
152
186 160 143 117 104 99
231
244
262

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Atomic radius

Atomic number

Ionisation enthalpy

Electron gain enthalpy

answer is C.

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Detailed Solution

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.

Hence option(C) is the correct answer.

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