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Physicists
N/A
13
Chemistry
11th Grade
11/07/2010

Additional Chemistry Flashcards

 


 

Cards

Term
Planck
Definition
explained atomic emission spectra; E=hv
Term
Bohr
Definition
  1. e- travel circular paths (orbits) around nucleus
  2. e- have fixed amount of energy; e- located at certain energy levels

student of Rutherford; Danish physicist

one e- system: Atomic Emission Spectrum of H atom

Term
Lyman
Definition
Spectral lines: set of wavelengths e- goes to n=1, UV light given off
Term
Balmer
Definition
e- goes to n=2, visible light given off
Term
Paschen
Definition
e- goes to n=3, infrared light given off
Term
de Broglie
Definition

all matter has wave and particle characteristics

λ = h/mv

 

*v:velocity

Term
Heisenberg
Definition
-- Uncertainty Principle: impossible to know momentum and position of particle at same time; disproves Bohr's e- orbit idea
Term
Schrodinger
Definition
mathematical model of the atom (quantum mechanical model)
Term
Aufbau Principle
Definition
e- enters orbitals of lowest energy first
Term
Pauli Exclusion Principle
Definition
an atomic orbital contains a max or 2e- with opposite spins
Term
Hund's rule
Definition
when e- occupy orbitals of = energy, one e- enters each orbital until all orbitals... up up up
Term
Lewis
Definition
Octet Rule: atoms gain or lose e- in order to obtain e- configuration of noble gas
Term
Einstein
Definition

described tiny packets of Radiant Energy as photons: behave as paricles not waves (Planck's theory)

 

E=mc2

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