The graduation of the metallic and nonmetallic property in the modern periodic table

Modern periodic table

Modern periodic table

Modern periodic table

In the modern periodic table , each period starts with the strong metal ( in group 1 ( 1 A ) , where the metallic property decreases by increasing the atomic number , till we reach the metalliods

Then the nonmetallic property appears , and increases by increasing the atomic number till we reach the strongest nonmetal ( in group 17 ( 7 A ) and ends in the inert gas ( group zero )  .

By increasing the atomic number ( within a period ) , the metallic property decreases , while the nonmetallic property increases .

In metallic groups , the metallic property increases gradually as we go from top to bottom as in group ( 1 A ) ( because the atomic size increases )  .

When you look within group ( 1 A ) in the modern periodic table , You will notice the graduation of the metallic property ,  Cesium  ( Cs ) is the most metallic element in group ( 1 A ) , and lithium ( Li ) is the least metallic element in group ( 1 A ) .

In nonmetallic groups , the nonmetallic property decreases gradually as we go from top to bottom as in group ( 7 A ) ( due to the decrease of the electronegativity ) .

When you look within group 7 A ( 17) in the modern periodic table , You will notice the graduation of nonmetallic property , Flourine ( F ) is the strongest nonmetal element in group ( 7 A ) . and Iodine ( I ) is the least nonmetal element in group ( 7 A ) .

When you look at the modern periodic table , you notice that there is a direct relationship between the atomic size of an element , and its metallic property .

There is a direct relationship between the electronegativity of an element , and its nonmetallic property .

Metallic & nonmetallic property , Acidic & basic property in the periodic table

Atoms components , Rutherford and Bohr’s Atomic Models

Modern periodic table and classification of Elements

Radius property , Ionization potential , Electron affinity & Electronegativity

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