1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

3. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

4. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

5. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

6. Who invented Nylon ?

Answer:

Wallace Carothers

7. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932