Chemistry - 9 Chapter - 3
Atomic Structure
Test - 16

1. Cathode rays cast a sharp shadow of an __________ object placed in their path


2. Like cathode rays, positive rays are also composed of ____________ particles


3. The mass of these positively charged particles was found almost same as that of an __________ of the gas used for their production.


4. Proton carries a unit ________________ charge


5. Alpha rays bend towards the _____________ pole when passed through an electric or magnetic field.


6. In natural radioactivity, nuclei of elements disintegrate to from other_____________.


7. Natural radioactivity is a _____________ property.


8. When Beryllium was bombarded with �-particles ____________ were evolved.


9. The mass of neutron is ____________ a.m.u.


10. Fundamental atomic particles are _____________ proton and neutron.\


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