1. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

2. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

3. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

4. Who invented Piano ?

Answer:

Bartolomeo Cristofori

5. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

6. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

7. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.