What are the salient features of Modern
Periodic Table? 
to metalloid to nonmetal to noble gas. 
Atomic size is a periodic property. As atomic number increases in a period, atomic radius decreases. As atomic number increases in a group, atomic radius increases. 
have larger atomic radii than their neutral atoms. 
In a group, each element has the same number of valence electrons. As a result, the elements in a group show similar chemical behaviour. 
Metallic character decreases from left to right in a period because of the increase in the effective nuclear charge. 
Non-metallic character increase from left to right in a period because of increase in


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