12 Questions
According to Thomson's experiments, what did he theorize about atoms?
Atoms contain negatively charged electrons.
In Rutherford's revised model of the atom, where is the majority of the atom's mass located?
In the positively charged nucleus.
What particle did James Chadwick discover in 1932?
Neutron
According to Niels Bohr's model, how do electrons move around the nucleus?
In fixed orbits like planets around the sun.
In the Quantum Mechanical Model, where are electrons placed?
In electron 'orbitals'.
What did Rutherford's Gold Foil Experiment conclude about the structure of an atom?
Atoms have a dense, positively charged nucleus surrounded by empty space.
According to Democritus, what does the term 'atom' mean?
Indivisible particle
How did Aristotle describe all matter in terms of basic substances?
As compositions of earth, water, air, and fire
What did John Dalton propose about atoms of different elements?
They are different from each other
How did Democritus describe the motion of atoms?
Random and unpredictable
What was the significance of John Dalton's proposal regarding the creation and destruction of atoms?
Atoms can neither be created nor destroyed
Which philosopher believed in the theory that all matter is made up of four basic substances with specific qualities?
Aristotle
Explore the evolution of atomic theories, from Aristotle's four basic substances to modern scientific understanding. Discover how old theories have been modified over time with new observations and advancements in technology.
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