Chemistry - 9 Chapter - 3
Atomic Structure
Test - 4

1. In 1886 _____________discovered proton




2. The phenomena of radioactivity was discovered by __________ in ________.



3. Which radio active material was discovered first?



4. Madam Curie discovered?



5. Madam Curie discovered radioactive material radium in.




6. Up till now almost ____________ radioactive materials have been discovered.




7. Neutron was discovered in 1932 by




8. Neutron was discovered when ________ was bombarded by a particles




9. Atomic Nucleus was discovered by ________ in 1909




10. In 1913 who found out that positive charge on nucleus is due to presence of protons in it.




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