Structure of the Atom: Charged Particles and Atomic Divisibility

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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?

Negatively charged radiations

Positively charged radiations (correct)

Gamma radiations

Neutral radiations

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?

Approximately 2000 times less Signup and view all the answers

How was the atom thought to be composed based on the discovery of protons and electrons?

Composed of protons and electrons balancing their charges Signup and view all the answers

What did E. Goldstein's discovery of canal rays ultimately lead to?

Discovery of protons Signup and view all the answers

What was the big question regarding the structure of atoms?

What sort of structure do the particles of the atom form? Signup and view all the answers

According to Dalton's atomic theory, what was the nature of the atom?

The atom was indivisible and indestructible. Signup and view all the answers

Who was the first scientist to propose a model for the structure of an atom?

J.J. Thomson Signup and view all the answers

What was the main challenge for scientists at the end of the 19th century?

To reveal the structure of the atom and explain its important properties. Signup and view all the answers

What did J.J. Thomson propose about the structure of an atom?

The atom consists of a positively charged sphere and the electrons are embedded in it. Signup and view all the answers

What led to the failure of Dalton's aspect of atomic theory?

The discovery of protons inside the atom. Signup and view all the answers

What did J.J. Thomson's model explain about atoms?

Atoms are electrically neutral. Signup and view all the answers

What were scientists trying to reveal about atoms based on a series of experiments?

The arrangement of sub-atomic particles within the atom. Signup and view all the answers

'What makes the atom of one element different from the atom of another element?' is an example of:

A rhetorical question. Signup and view all the answers

According to Thomson's model, what are atoms composed of?

A positively charged sphere with embedded electrons Signup and view all the answers

Structure of the Atom: Charged Particles and Atomic Divisibility

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Questions and Answers

Who identified the presence of the electron?

What are the canal rays discovered by E. Goldstein?

What is the charge 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?

What did E. Goldstein's discovery of canal rays ultimately lead to?

What was the big question regarding the structure of atoms?

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?

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 led to the failure of Dalton's aspect of atomic theory?

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 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?

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