Home  >  Class 11 Chemistry  >  Class 11 Chemistry Practice Test: Classification of Elements and Periodicity in Properties - Modern Periodic Law and the Present Form of the Periodic Table

____________ observed the X-rays’ characteristics.

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The modern periodic law states that the physical and chemical properties of the elements are the periodic functions of their atomic numbers. Elements are arranged in increasing order of their atomic numbers from left to right across each row.


____________ observed the X-rays’ characteristics.






 
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