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Questions and Answers
Which sub-atomic particle was discovered by J.J. Thomson?
Which sub-atomic particle was discovered by J.J. Thomson?
- Electron (correct)
- Proton
- Canal rays
- Neutron
What is the mass of an electron compared to that of a proton?
What is the mass of an electron compared to that of a proton?
- Equal
- Negligible
- Approximately 2000 times more
- Approximately 2000 times less (correct)
Who discovered the presence of canal rays in a gas discharge?
Who discovered the presence of canal rays in a gas discharge?
- Neils Bohr
- E. Goldstein (correct)
- Ernest Rutherford
- J.J. Thomson
What type of radiations were discovered by E. Goldstein in a gas discharge?
What type of radiations were discovered by E. Goldstein in a gas discharge?
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What is the charge of a proton?
What is the charge of a proton?
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What was the major challenge faced by scientists at the end of the 19th century?
What was the major challenge faced by scientists at the end of the 19th century?
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Which scientist was the first to propose a model for the structure of an atom?
Which scientist was the first to propose a model for the structure of an atom?
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What did Dalton's atomic theory suggest about the atom?
What did Dalton's atomic theory suggest about the atom?
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What did J.J. Thomson propose about the structure of an atom?
What did J.J. Thomson propose about the structure of an atom?
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What led to the failure of one aspect of Dalton’s atomic theory?
What led to the failure of one aspect of Dalton’s atomic theory?
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