1. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

2. Who invented Helicopter ?

Answer:

Igor Sikorsky

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

5. Who invented Safety Pin ?

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

6. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

7. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912