railway RRB Technician Grade 3 Mock Test 2024 Chemistry Some Basic Concepts of Chemistry

ପରମାଣୁ ନ୍ୟୁକ୍ଲିୟସର ବ୍ୟାସାର୍ଦ୍ଧ କେଉଁ କ୍ରମର ଅଟେ : 

1
10 -10 ମି
2
10 -13 ମି
3
10 -15 ମି
4
10 -8 ମି
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