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Ch. 5-
Electrons in Atoms
Question | Answer |
---|---|
Electromagnetic Radiation | a form of energy that exhibits wavelike behavior as it travels through space |
Wavelength | the shortest distance between equivalent points on a continuous wave |
Frequency | the number of waves that pass a given point per second |
Amplitude | the waves hieght from the orgin to a crest,or from the orgin to a trough |
Electromagnetic spectrum | encompasses all forms of electromagnetic radiation,with the only diffference in the types of tradition being their frequencies and wavelenghts |
Quantum | the minimum amount of energy that can be gained or lost by an atom |
Planack's constant | which has a value of 6.626*10-34J*s,where J is the symbol for a joule |
photoelectric effect | electrons,called photoelectrons,are emitted from a metal's surface when a light of a certain frequency shines on surface |
photon | a particle of electromagnetic radiation with no mass that carries a quantum of energy |
atomic emission spectrum | a set of frequencies of electromagnetic waves of given off by atoms of an element,consists of a series of line of indivisual colors |
ground state | the lowest allowable energy state of an atom |
de Broglie equation | predicts that all moving paeticles have wave characters |
Heisenberg uncertainly principle | states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time |
quantum mechanical model of the atom | the atomic model in which electrons are treated as waves is the called the wave mechanical model of the atom |
atomic orbital | a three-demensional region around the nucleus |
principal quantum number | indicate the relative sizes and energies of atomic orbitals |
principal energy level | specifies the atom's major energy level |
energy sublevels | the energy levels that contained within a principle energy level |