Prof Temmy's questions on atomic model

Dalton's atomic theory was in what year ? And it was proved wrong through?

• 1908, Electrolysis which indicates that compound particles contain ion

• 1908, Electrolysis which indicates that compound particles contain electron

• 1808, Electrolysis which indicates that compound particles contain ion

• 1808, which indicates that compound particles contain electron

What are the conditions for gas to conduct electricity

• At low pressure and high potential voltage
• At high voltage and low pressure

• Low potential difference and low pressure

• Higher potential difference and high pressure

In what year did Thomson discover electron

• 1897
• 1886

• 1897

• 1997

What's the colour that was being produced by the cathode ray

• Green

• Red

• Bright green

• Bright red

What's the violate and pressure used by Thompson in the cathode ray experiment

• initial 5000v and 0.0001 ATM the later to 1500v

• Initial 15,000 at 0.0001 ATM then to 5000v

• Initial 5,000 at 0.00001 ATM to 7000v

• Initial 5000v at 0.0001 ATM to 15,000v

Properties of cathode rays include

They travel in _______ lines and _________ of opaque objects , and they produce _______ motions, and they are _______ in nature and in _____ to ____, irrespective of the ________ or metal used in the ______

Who discover electron, neutron and proton respectively

What's the charge to mass of an electron

• 1.16 * 10^11

• 1.17 *10^ -11

• 1.76*10^11

• 1.78*10^13

Who discover charge of electron

• Thompson

• Rutherford

• Millikan

• Prof temmy

Who discover the ratio of charge to mass of an electron

• Rutherford

• Milikan

• Thompson

• Faraday