General Science Chemistry Structure of Atom

ସୋଡିୟମ୍ ପେରକ୍ସାଇଡ୍ ର ଗୋଟିଏ ଅଣୁରେ କେତେ ସୋଡିୟମ୍ ପରମାଣୁ ଅଛି?

1
ଚାରି
2
ତିନି
3
ଗୋଟିଏ 
4
ଦୁଇଟି

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