1. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

2. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

3. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

4. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

5. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

6. Who invented Hydrogen bomb ?

Answer:

Edward Teller

7. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913