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30 Cards in this Set

  • Front
  • Back
proposed all of an atom's positive charge and cirtually all mass is in nucleus
form of energy that exhibits wavelike behavior (give examples)
electromagnetic waves (ex. visible light, X-rays, microwaves, radiowaves
shorest distance between equivalent points on continuous wave
number of waves that pass given point per second (hertz)
waves' height from origin to a crest or from origin toa trough
sign for amplitude
c is equal to what number
encompasses all forms of electromagnetic radiation with only differences in the types of radiation being their frequencies and wavelengths
electromagnetic spectrum (EM spectrum)
Deals with quantums
planck's concept
matter can gain or lose energy only in small specific amounts called quanta
Planck's concept
minimum amount of energy that can be gained or lost by an atom
photoelectrons are emitted from a metal's surface when light of a certain frequency hits it
photoelectric effect
particle of electromagnetic radiation with no mass that carries a quantum of energy
The lowest allowable energy state of an atom is called its
ground state
when an atom gains energy, it is said to be in an
excited stateq
Young danish physicist working in rutherford's lab propsed a answer to what question? name danish
Bohr, Why are element's atomic emission spectra discontinuous rather than continuous
predicts that all moving particles have wave characteristics
de Broglie equation
states that it is fundamentally umpossible to know precisely both the velocity and the position of a particle at the same time
Heisenberg uncertainty principle
the atomic model in whcih electrons are treated as waves is called the wave mechanical model of the atom or
the quantum mechanical model of the atom
three dimensional region around the nucleus that describes the electron's probable location
atomic orbital
indicates the relative sizes and energies of atomic orbitals
principal quantum numbers
specifies the atom's major energy levels
major energy levels are called
principle energy levels
the arrangement of electrons in an atom
electron configuration
states that each electron occupues the lowest energy oribital available
aufbau principle
Pauli exclusion principle
a maximum of two electrons may occupy a single atomic orbital but only of the electrons have opposite spins
states that single electrons with the same spin must occupy each equal energy orbital before additional electrons iwth opposite spins can occupy the same orbital
Hund's rule
electron-dot structure
consists of the elemtn's symbol, which represents that atomic nucleus and innerlevel electrons surrounded by dots representing the atom's valence electrons