SSC SSC GD Constable 2025 Mock Test Series General Science Chemistry Basic Concepts of Chemistry

ଇଲେକ୍ଟ୍ରନ୍ ________ ଦ୍ୱାରା ଆବିଷ୍କୃତ ହୋଇଥିଲା |

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ଜେଜେ ଥମସନ 
2
ଜନ ଡାଲଟନ୍ 
3
ଜେମ୍ସ ଚାଡୱିକ୍ 
4
ରଥରଫୋର୍ଡ 
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