1. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

2. Who invented Laser ?

Answer:

Charles H. Townes

3. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

4. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

5. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805