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Chapt. 5-1

Chapt. 5

Method for determining standard mass of atoms Initiated search for relationships in properties Stanislao Cannizzaro
Mass/known chem. props. Arranged by properties Left blanks for undiscovered elements Mendeleev
Arranged by Nuclear charge Physical and Chemical Properties of elements are periodic functions of Atomic # Moseley
Property of elements in the table change with the position; follow periodic Law Periodic Functions
Arranges elements in order of atomic number so that elements with similar properties fall in same groups Modern Periodic Table
Found noble gasses in 1894 Strutt, Ramsay, Dorn
Similar Chem. Behavior Bottom table Lanthanides
Similar to Lanthanides but with own specific properties Bottom of bottom Actinides
Layed out in periods (horizontal): allows for families with similar properties Atomic Numbers in Groups 1 &18: 8,8,18,18,32 Periodicity
When Elements are are odered by increasing atomic number elements with the same properties appear periodically Periodic Law
Created by: jenniferbauer



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