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Chapters%WP_TITLE_SEP%Discoveries and Inventions
Who discovered oxygen?
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March 29, 2026
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Who discovered first polio vaccine?
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March 29, 2026
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‘Electric Battery’ was invented by __ and he was from
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Who published the first recognizable periodic table?
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March 29, 2026
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Who discovered hydrogen?
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March 29, 2026
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In which year Mendeleev gave his periodic table?
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March 29, 2026
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Which element is the first element in the periodic table?
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March 29, 2026
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How many elements were present in Mendeleev’s table?
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March 29, 2026
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Who invented the first ever safety elevator?
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March 29, 2026
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Who discovered Penicillin?
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March 29, 2026
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