1. The term atom was introduced by - Ostward
2. The first atomic theory was postulated by - John Dalton
3. The term molecule was introduced by - Avogadro
4. Wave mechanical model of atom was introduced by - Max Plank
5. The nuclear model of atom was introduced by - J.J Thomson
6. The smallest atom - Helium
7. Neutron was discovered by - James Chadwick
8. The lightest metal - Lithium
9. The acid present in vinegar is - Acetic acid
10. Tea contain - Tannic acid
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