1. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

2. Who invented Printing Press ?

Answer:

Johannes Gutenberg

3. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

4. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

5. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

6. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

7. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698