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Questions and Answers
Democritus proposed the idea that all matter is made up of indivisible particles called atoms.
Democritus proposed the idea that all matter is made up of indivisible particles called atoms.
True (A)
Johan Dalton suggested that elements are made up of tiny divisible particles called atoms.
Johan Dalton suggested that elements are made up of tiny divisible particles called atoms.
False (B)
According to Dalton, there are no particles smaller than an atom.
According to Dalton, there are no particles smaller than an atom.
True (A)
Sub-atomic particles like electron, proton, and neutron were discovered at the beginning of the 19th century.
Sub-atomic particles like electron, proton, and neutron were discovered at the beginning of the 19th century.
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The electron was first discovered by M. Faraday, William Crooks, and J.J. Thomson.
The electron was first discovered by M. Faraday, William Crooks, and J.J. Thomson.
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Chadwick was one of the scientists who identified the proton as a sub-atomic particle.
Chadwick was one of the scientists who identified the proton as a sub-atomic particle.
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