Exam (elaborations)
Atom Scientist Questions and Answers 2024
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Exam of 2 pages for the course Atom at Atom (Atom Scientist)
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Atom ScientistDalton - answer a. matter = tiny spheres called atoms
b. matter = only one type of atom
Thomson - answer Discovers the electron. Made the Plum Pudding Model.
Rutherford - answer a) Gold Foil Experiment.
b) Discovered the nucleus
c) Atom mainly empty space.
Bohr - answer1) Todays Planetary Model.
(Protons and neutrons in the nuclus, electrons revolving around)
Chadwick - answerDiscovered the neutron.
What discoveries are each of the people famous for? - answer Democritus: naming the
atom as identical indivisable units. Aristotle: didn't believe you could ever stop dividing.
Dalton: performed experiments to prove atom existed. Thompson: discovered smaller
particles inside atom (electrons). Rutherford: revised model to include nucleus. Bohr:
electrons orbit nucleus. Schrodinger: electrons orbit in clouds. Chadwick: discovered
neutrons.
What discovery demonstrated that atoms are not the smallest particles? - answerJ.J.
Thomson discovery of electrons inside atoms.
In what part of the atom is most of the mass located? - answernucleus
What are the two differences between the atomic theory described by Thomson and
that described by Rutherford. - answerThomson's theory included the atoms having
electrons, while Rutherford's said that atoms have a nucleus and electrons orbit the
nucleus. the two differences are where the electrons ARE and nucleus or no-nucleus.
Identify the difference in how Bohr's theory and the modern theory describe the location
of electrons. - answerthe difference is that Bohr's theory was that electrons orbited in
definite circular paths, while the modern theory says that electrons orbit in clouds.
What does the current model of the atom look like? - answerthe current model of an
atom has a nucleus in the center, and many electron clouds orbiting around it.
All elements are composed of atoms that cannot be divided - answer(John Dalton)
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