18 Questions
What was the name given to the rays produced by electrons striking a material in the cathode ray tubes?
X-rays
What was the radius of the atom according to Thomson's model?
10^(-10) m
What was the arrangement of electrons in Thomson's model of the atom?
Electrons were embedded in a uniform distribution of positive charge
What was the assumption about the mass of the atom in Thomson's model?
The mass of the atom was uniformly distributed
What was the limitation of Thomson's model?
It was not consistent with the results of later experiments
What was the significance of Röentgen's discovery in 1895?
It showed that X-rays can cause fluorescence in certain materials
What is the Greek word from which the term 'atom' has been derived?
a-tomio
Who among the following ancient philosophers proposed the existence of atoms?
Both Indian and Greek philosophers
What is the name of the scientist who proposed the model of an atom in which an atom is like a sphere of positively charged matter with negatively charged electrons embedded in it?
J.J. Thomson
What are the three fundamental particles that make up an atom?
Proton, electron, neutron
In the Thomson model of an atom, what is the negatively charged particle embedded in the positively charged sphere?
Electron
What was the limitation of the ancient philosophical ideas about atoms?
They were not based on experimental evidence
What was the major flaw in Thomson's model of the atom as revealed by Rutherford's gold foil experiment?
The positive charge was spread throughout the atom
What is the approximate size of the nucleus compared to the atom?
1/100,000th the size of the atom
What is the primary region of the atom where most of the mass and positive charge are concentrated?
Nucleus
What is the analogy used to describe the structure of the atom in Rutherford's model?
Solar system
What was the key observation that led Rutherford to propose the nuclear model of the atom?
Some alpha particles were deflected
What is the approximate size of the atom's radius if a cricket ball represents the nucleus?
5 km
This quiz is about Thomson's model of an atom, proposed in 1898. It describes the structure and arrangement of electrons in an atom. Learn about the plum pudding model and its characteristics.
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