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Questions and Answers
According to Democritus, what are the two main components of the universe?
According to Democritus, what are the two main components of the universe?
- Protons and electrons
- Atoms and protons
- Atoms and the void (correct)
- Molecules and subatomic particles
What did Democritus believe atoms are?
What did Democritus believe atoms are?
- Energy particles
- Divisible and destructible particles
- Indivisible and indestructible particles (correct)
- Composite particles
How many elements did Democritus propose make up all things?
How many elements did Democritus propose make up all things?
- Three elements
- Five elements
- Four elements
- Two elements (correct)
What was John Dalton's view on the divisibility of atoms?
What was John Dalton's view on the divisibility of atoms?
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According to John Dalton, how are atoms of the same element?
According to John Dalton, how are atoms of the same element?
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Who was the first to propose the existence of negatively charged electrons?
Who was the first to propose the existence of negatively charged electrons?
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What did J.J. Thomson believe about the distribution of charges within an atom?
What did J.J. Thomson believe about the distribution of charges within an atom?
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Who measured the charge of an electron using oil droplets?
Who measured the charge of an electron using oil droplets?
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What is Rutherford's contribution to atomic theory?
What is Rutherford's contribution to atomic theory?
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What did Robert Millikan measure in 1909 related to electrons?
What did Robert Millikan measure in 1909 related to electrons?
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