9th science ch 4।atomic structure।parmanu sanrachna।radioactive isotopes|रेडियोसक्रिया समस्थानिक
1:26:01
9th ncert math ex 2.3।9th polynomials।9th bahupad।factor theorem।gunankhand pramey #mathematics
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9th science ch 4।atomic structure।parmanu sanrachna।isotopes।samsthanik par prashna
9:37
This Winter Is Starting Off With A BANG…
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9th ncert math ex 2.3।9th polynomials।9th bahupad।factor theorem।gunankhand pramey।intro
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9th science ch 3|atomic structure|valency and valance electron|संयोजकता क्या है|संयोजी इलेक्ट्रॉन
15:59
9th science ch 4|atomic structure|परमाणु संरचना|रदरफोर्ड का परमाणु मॉडल|atomic theory of rutherford
13:40
9th science ch 4|parmanu sanrachna |bore ka parmanu model |atomic structure |बोर का परमाणु मॉडल
19:43