16 Questions
Who first proposed the atomic theory of matter on a firm scientific basis?
John Dalton
What did John Dalton's atomic theory regard the atom as?
The ultimate particle of matter
What did the experimental observations made by scientists in the late 19th and early 20th century establish about atoms?
Atoms can be further divided into subatomic particles
What was one of the major problems for scientists after the discovery of sub-atomic particles?
To account for the stability of atom after the discovery of sub-atomic particles
What did Dalton's atomic theory successfully explain?
The law of conservation of mass
Who showed that if electricity is passed through a solution of an electrolyte, chemical reactions occurred at the electrodes?
Michael Faraday
What did Michael Faraday's results suggest about electricity?
Electricity has a particulate nature
When did many scientists, mainly Faraday, begin to study electrical discharge in partially evacuated tubes?
Mid 1850s
What were the tubes known as that many scientists studied to understand electrical discharge?
'Partially evacuated' tubes
What did cathode ray discharge tubes contain?
Metal and glass electrodes
Who is credited with the discovery of electron, proton, and neutron?
Early Indian and Greek philosophers
What does the word 'atom' mean in Greek?
Uncutable
Who proposed the concept of atoms as the fundamental building blocks of matter?
Early Indian and Greek philosophers
Which atomic model introduced the concept of quantized energy levels?
Bohr model
What important features are associated with the quantum mechanical model of the atom?
Quantized energy levels
What did early Indian and Greek philosophers believe about atoms?
They are fundamentally indivisible
Explore the internal structure of atoms, including the discovery of electron, proton, and neutron, as well as the characteristics of these particles. Learn about the Thomson, Rutherford, and Bohr atomic models, and understand the important features of the quantum mechanical model of the atom. Delve into the nature of electromagnetic radiation and Planck's quantum theory.
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