Structure of the Atom — Important Questions
Telangana Open School (TOSS) · Class 12 · Physics
45 important questions from Structure of the Atom for Telangana Open School (TOSS) Class 12 Physics, with answers. Written for the board exams 2027.
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Important Questions from Structure of the Atom
Which scientist discovered the electron?
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J.J. Thomson
J.J. Thomson discovered the electron while studying cathode rays in discharge tubes.
What does the term 'nucleus' refer to in an atom?
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Central core containing protons and neutrons
The nucleus is the dense central part of the atom containing protons and neutrons, carrying most of the mass.
What is the approximate size of the nucleus compared to the atom?
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10^5 times smaller
The nucleus is about 10⁻¹⁵ m in size, while the atom is about 10⁻¹⁰ m, making it 10⁵ times smaller.
Which atomic model introduced stationary orbits for electrons?
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Bohr model
Bohr introduced the idea of stationary orbits where electrons do not radiate energy while revolving.
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