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Dear Student,
The periodic properties followed in a periodic table are Ionization energy, atomic radius, electron affinity, and electronegativity.
There is seen a general trend in the periodicity of elements:
1. Moving across the period (Left to Right)-
 Ionization energy increases
 Electronegativity increases
Electron affinity increases
Atomic Radius decreases
 2. Moving from up to down the group-
Ionization energy decreases
 electronegativity decreases
 Electron affinity decreases
Atomic radius increases
 Hope this information will clear your doubts about the topic.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

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