SSC SSC Selection Post (Phase 13) 2025 Mock Test General Science Chemistry Basic Concepts of Chemistry

ଏକ ଉପାଦାନର ପରମାଣୁରେ 10 ଟି ଇଲେକ୍ଟ୍ରନ୍, 10 ଟି ପ୍ରୋଟନ୍ ଏବଂ 12 ଟି ନ୍ୟୁଟ୍ରନ୍ ଥାଏ | ସେହି ଉପାଦାନର ପରମାଣୁ ବସ୍ତୁତ୍ଵ କ’ଣ?

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32
2
22
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44
4
20
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