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#53684 Bangla Language & Literature পরমানুর গঠন Level 0

নিউক্লিয়ন সংখ্যা A, প্রোটন সংখ্যা P, নিউট্রন সংখ্যা N হলে, পারমাণবিক ভর সংখ্যা-

  1. A A=P+N
  2. B M=P+N
  3. C N=A+P
  4. D Z=A+P
Answer: A - A=P+N

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