railway RRB Group D Mock Test Series 2024-25 General Science Chemistry Classification of Elements and Periodicity in Properties

आधुनिक आवर्त नियम (Modern Periodic Law) का प्रतिपादन किसने किया?

1
मोसले 
2
लोथर मेयर 
3
मेंडलीव
4
डोबेराइनर
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