who discovered first phenomenon
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1
Answer:
Antoine Henri Becquerel
French engineer
Explanation:
the first person to discover evidence of radioactivity. For work in this field he, along with Marie Skłodowska-Curie (Marie Curie) and Pierre Curie,[3] received the 1903 Nobel Prize in Physics
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1
Answer:
the scientific study of the structure of substances and what happens to them in different conditions or when mixed with each other
पदार्थों की संरचना तथा विभिन्न परिस्थितियों अथवा एक-दूसरे के साथ मिलाने पर उनमें होनेवाले परिवर्तनों का वैज्ञानिक अध्ययन; रसायनशास्त्र
2.
the structure of a particular substance
पदार्थ-विशेष की संरचना या बनावट
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