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Questions and Answers
Who discovered the presence of new radiations in a gas discharge and called them canal rays?
Who discovered the presence of new radiations in a gas discharge and called them canal rays?
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 are the charged particles that make up an atom?
What are the charged particles that make up an atom?
What is the charge of a proton?
What is the charge of a proton?
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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?
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What was the big question about the structure of the atom?
What was the big question about the structure of the atom?
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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?
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What did J.J. Thomson's model propose about the atom's structure?
What did J.J. Thomson's model propose about the atom's structure?
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What led to the failure of Dalton's atomic theory regarding the indivisibility of atoms?
What led to the failure of Dalton's atomic theory regarding the indivisibility of atoms?
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What was one of the first indications that atoms are not indivisible?
What was one of the first indications that atoms are not indivisible?
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What sub-atomic particle did J.J. Thomson identify?
What sub-atomic particle did J.J. Thomson identify?
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What did E. Goldstein discover in 1886 in a gas discharge?
What did E. Goldstein discover in 1886 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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How does the mass of an electron compare to that of a proton?
How does the mass of an electron compare to that of a proton?
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What is the name given to the sub-atomic particle with a charge equal in magnitude but opposite in sign to that of the electron?
What is the name given to the sub-atomic particle with a charge equal in magnitude but opposite in sign to that of the electron?
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What major challenge did scientists face at the end of the 19th century?
What major challenge did scientists face at the end of the 19th century?
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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?
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What did Dalton's atomic theory propose about the atom?
What did Dalton's atomic theory propose about the atom?
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What was one of the first indications that atoms are not indivisible?
What was one of the first indications that atoms are not indivisible?
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What did Thomson propose about the structure of the atom?
What did Thomson propose about the structure of the atom?
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