Ami je porisilu, eita logical lagise—nucleus attraction barile size kom, group down korile electron shell bari, so valency ar metallic character eita follow kore. Kintu amar college-r chemistry lab-r toiri chart dekhi, first year-r pressure e besi, bonding bujha-r chote amak simple bamboo weaving-r pattern guchi lage—ekhan logic clear holeu, practical-r majote kichu alag feel hoi.
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