সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
What are elements containing the same number of protons but different number of neutrons called?
What are elements containing the same number of protons but different number of neutrons called?
- ক. compounds
- খ. allotropes
- গ. isotopes
- ঘ. isobars
সঠিক উত্তরঃ isotopes
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