BJ Chem Ch 4 Atomic Structure - History Pt. 2 of 2
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each of the black spaces below before clicking
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| Person:first to refer to the smallest particles as atoms | Democritus
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| model:first model to include atoms of each element having different masses | Dalton's atomic theory
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| model:helped explain line spectra | Bohr's model
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| any sample of water always contains 8 g of oxygen for every 1 g of hydrogen | law of definite composition
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| principle:impossible to know both the energy and the exact position of an electron at the same time. | Heisenberg uncertainty principle
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| principle:describes how electrons fill orbitals | Aufbau principle
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| principle:describes how electrons fill a sublevel | Hund's rule
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| principle:no two electrons in an atom can have the same set of four quantum numbers | Pauli exclusion principle
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| region of space where an electron is most probably found is known as a(n) _______: | orbital
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| Each atom can be identified by the number of _____ in its nucleus. | protons
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| the principal energy level of an electron is the a) first b) second quantum number. | a) first
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| person:cathode rays | Thomson
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| person:"planatary" model of the atom | Neils Bohr
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| person:x-rays | Wilhelm Roentgen
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| person:prism spectroscope | Gustav KirchossRobert Bunsen
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| person:magnetic resonance imaging | Raymond Damadian
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| person:student who did gold foil experiment | Hans Geiger(Rutherford)
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| person:protons | Ernest Rutherford
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| person:neutrons | James Chadwick
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| person:principle energy levels | Niels Bohr
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