Multilingual learning is ready for competitive exam preparation.
Permanent question page

Chemistry Gk question with answer

Read, practise, and share this question using its permanent link.

Question #7,478
Chemistry Gk हिन्दी MCQ

Q.19 प्रोटॉन और 20 न्यूट्रॉन वाले परमाणु की द्रव्यमान संख्या कितनी है?