TRENDS IN PERIODIC TABLE

Trends In Periods

Periodic Trends In Physical Properties|Merits Of Long Form Of Periodic Table|Periodicity In Physical Properties|Lanthanide Contraction|OMR

On going down a main sub-group in the periodic table (example Li to Cs in IA or Be to Ra in IIA), the expected trend of changes in atomic radius is a

Mendeleev's Periodic Law|Significance Of Mendeleev's Periodic Table |Limitation Of Mendeleev's Periodic Table |Moseley Work |Modern Periodic Law |Periodic Table Of The Elements |Summary

Modern Peridic Table OF Trends

(a) Electropositive nature of the element(s) increases down the group and decreases across the period. (b) Electronegativity of the element decreases down the group and increases across the period. (c) Atomic size increases down the group and decreases across a period (left to right). (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the most electropositive element among them.