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BJ Chem Ch 4 At His

BJ Chem Ch 4 Atomic Structure - History Pt. 2 of 2

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



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