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নিউক্লিয়ন বা ভর সংখ্যা কী?

Md. Saifur Rahman

পরমাণুর নিউক্লিয়াসে অবস্থিত প্রোটন ও নিউট্রনের মোট সংখ্যাকে নিউক্লিয়ন সংখ্যা বলে। যেমন- Na পরমাণুর নিউক্লিয়াসে 11 টি প্রোটন ও 12 টি নিউট্রন রয়েছে।

সুতরাং Na পরমাণুর নিউক্লিয়ন সংখ্যা (11+12)= 23।

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