Chem test 3 2
Terms
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- proposed all of an atom's positive charge and cirtually all mass is in nucleus
- Rutherford
- form of energy that exhibits wavelike behavior (give examples)
- electromagnetic waves (ex. visible light, X-rays, microwaves, radiowaves
- lambda
- wavelength
- shorest distance between equivalent points on continuous wave
- wavelength
- v
- frequency
- number of waves that pass given point per second (hertz)
- frequency
- waves' height from origin to a crest or from origin toa trough
- amplitude
- sign for amplitude
- c
- c is equal to what number
- 3.00*108
- 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
- quantum
- 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
- photon
- 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
- n
- 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