Podcast
Questions and Answers
Who identified the presence of the electron?
Who identified the presence of the electron?
- J.J. Thomson (correct)
- Ernest Rutherford
- E. Goldstein
- Marie Curie
What are the canal rays discovered by E. Goldstein?
What are the canal rays discovered by E. Goldstein?
- Negatively charged radiations
- Positively charged radiations (correct)
- Gamma radiations
- Neutral radiations
What is the charge of a proton?
What is the charge of a proton?
- Minus two
- Minus one
- Plus two
- Plus one (correct)
What is the mass of an electron compared to the mass of a proton?
What is the mass of an electron compared to the mass of a proton?
How was the atom thought to be composed based on the discovery of protons and electrons?
How was the atom thought to be composed based on the discovery of protons and electrons?
What did E. Goldstein's discovery of canal rays ultimately lead to?
What did E. Goldstein's discovery of canal rays ultimately lead to?
What was the big question regarding the structure of atoms?
What was the big question regarding the structure of atoms?
According to Dalton's atomic theory, what was the nature of the atom?
According to Dalton's atomic theory, what was the nature of the atom?
Who was the first scientist to propose a model for the structure of an atom?
Who was the first scientist to propose a model for the structure of an atom?
What was the main challenge for scientists at the end of the 19th century?
What was the main challenge for scientists at the end of the 19th century?
What did J.J. Thomson propose about the structure of an atom?
What did J.J. Thomson propose about the structure of an atom?
What led to the failure of Dalton's aspect of atomic theory?
What led to the failure of Dalton's aspect of atomic theory?
What did J.J. Thomson's model explain about atoms?
What did J.J. Thomson's model explain about atoms?
What were scientists trying to reveal about atoms based on a series of experiments?
What were scientists trying to reveal about atoms based on a series of experiments?
'What makes the atom of one element different from the atom of another element?' is an example of:
'What makes the atom of one element different from the atom of another element?' is an example of:
According to Thomson's model, what are atoms composed of?
According to Thomson's model, what are atoms composed of?
