railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Chemistry Structure of Atom

ଏକ ଇଲେକଟ୍ରନ ର ବସ୍ତୁତ୍ଵ _______ ଅଟେ ।  

1
9.1 × 10-31କିଲୋଗ୍ରାମ 
2
1.67 × 10-27 କିଲୋଗ୍ରାମ 
3
9.1 × 10-35 କିଲୋଗ୍ରାମ 
4
1.67 × 10-31କିଲୋଗ୍ରାମ 
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