SSC Delhi Police Constable 2025 Mock Test Series (New) General Science Chemistry Classification of Elements and Periodicity in Properties

आधुनिक आवर्त नियम ________ द्वारा दिया गया था।

1
ळवोइसिएर
2
मोस्ले
3
मेंडलीव
4
लोथर-मेयर
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