Periodic Table — Periodic Properties & Variation of Properties — Question 6

The property trends in general on moving from left to right in a period of the periodic table are :

1. Number of valence electrons — increases by one
2. Atomic radius — decreases.
3. Ionization potential — increases.
4. Electron affinity — increases (exception, electron affinity is zero for noble gases).
5. Non-metallic character — increases.
6. Metallic character — decreases
7. Electronegativity — increases (with the exception of noble gases, they have complete octet so do not attract electrons to itself).