2nd sec revision unit 1

1- The atomic model that states the idea of neutralization of the atom is

• Rutherford model

• Thomson model

• Dalton model

• Aresto

The scientist who discovered the charge of the nucleus

• Rutherford model

• Thomson model

• Dalton model

• Aresto

He postulates The quantization of electron energy levels  

• Rutherford model

• Thomson model

• Bohr

• Aresto

What happens when an electron gains energy in an atom?

• It moves to a lower level     

• It is absorbed by the nucleus  

• It becomes a proton   

• It moves to a higher energy level

The line spectral is specific because there is no two elements have the same

• mass No.

• Atomic No.

• Atomic Mass

• same energy

The cathode rays consist of

• protons

• neutrons

• electrons

• alpha

Region at which the electrons most probable found is called

• electrton cloud

• energy levels

• orbital

• nucleus

Region at which the electrons may be found is called

• electrton cloud

• energy levels

• orbital

• nucleus

According to Rutherford theory when alpha rays pass that indicates

• the atom contain vast space

• the atom contains dense part called nucleus

• the dense part is positive

• the is no electrons

According to Rutherford theory when alpha rays reflect that indicates

• the atom contain vast space

• the atom contains dense part called nucleus

• the dense part is positive

• the is no electrons