1. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

2. Who invented Radiocarbon ?

Answer:

Willard Libby

3. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.