Chemistry · Discoveries and Inventions
रेडियोधर्मी तत्व रेडियम की खोज किसने की थी?
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- 1हेनरी बेकरेल और दिमित्री मेंडेलीव
- 2मैरी क्यूरी और पियरे क्यूरी✓
- 3जोसेफ प्रीस्टली और जे. रॉबर्ट ओपेनहाइमर
- 4जेम्स डाल्टन और डेविड ब्रूस्टर
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