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Evolution of Atomic Theories: From Aristotle to Modern Science

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Evolution of Atomic Theories: From Aristotle to Modern Science

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Questions and Answers

According to Thomson's experiments, what did he theorize about atoms?

Atoms are positively charged throughout.

Atoms consist of positively charged electrons.

Atoms contain negatively charged electrons. (correct)

Atoms do not contain any particles.

In Rutherford's revised model of the atom, where is the majority of the atom's mass located?

In the negatively charged electrons.

In the positively charged nucleus. (correct)

Evenly distributed throughout the atom.

In the empty space around the nucleus.

What particle did James Chadwick discover in 1932?

Electron

Proton

Neutron (correct)

Positron

According to Niels Bohr's model, how do electrons move around the nucleus?

In fixed orbits like planets around the sun. Signup and view all the answers

In the Quantum Mechanical Model, where are electrons placed?

In electron 'orbitals'. Signup and view all the answers

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. Signup and view all the answers

According to Democritus, what does the term 'atom' mean?

Indivisible particle Signup and view all the answers

How did Aristotle describe all matter in terms of basic substances?

As compositions of earth, water, air, and fire Signup and view all the answers

What did John Dalton propose about atoms of different elements?

They are different from each other Signup and view all the answers

How did Democritus describe the motion of atoms?

Random and unpredictable Signup and view all the answers

What was the significance of John Dalton's proposal regarding the creation and destruction of atoms?

Atoms can neither be created nor destroyed Signup and view all the answers

Which philosopher believed in the theory that all matter is made up of four basic substances with specific qualities?

Aristotle Signup and view all the answers