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Chap 5 Chem
| Term | Definition |
|---|---|
| energy, wave | electromagnetic radiation is a kind of_______ that behaves like a _______ |
| Light | one type of electromagnetic radiation |
| speed | all waves can be characterized by their wavelength, amplitude, frequency, and _____ |
| wavelength | The shortest distance between equivalent points on a continuous wave is called _____ |
| amplitude | The height of a wave from the origin to a crest or from the origin to a trough is the ___ |
| frequency | the number of waves that pass a given point in one second |
| hertz | the SI unit for frequency is ____ which is equivalent to one wave per second |
| quantum | the minimum amount of energy that can be lost or gained by an atom |
| whole number multiples of hv | according to planck's theory, for a given frequency, v, matter can emit of absorb energy only in |
| photoelectric effect | the phenomenon in which electrons are emitted from a metal's surface when light of a certain frequency shines on it |
| false | like the visible spectrum, an atomic emission spectrum is a continuous range of colors |
| true | each element has a unique atomic emission spectrum |
| true | a flame test can be used to identify the presence of certain elements in a compound |
| true | the fact that only certain colors appear in an element's atomic emission spectrum indicates that only certain frequencies of light are emitted |
| false | atomic emission spectra can be explained by the wave model of light |
| false | the neon atoms in a neon sign emit their characteristic color of light as they absorb energy |
| true | when an atom emits light, photons having certain specific energies are being emitted |
| ground state | the lowest allowable energy state of an atom is called _____ |
| frequencies | Bohr's model of the atom predicted the _______ of the lines in hydrogen's atomic emission spectrum |
| lower | according to Bohr's atomic model, the smaller an electrons orbit, the _____ the atom's energy level |
| higher | according to Bohr's atomic model, the larger an electron's orbit, the ____ the atom's energy level |
| electron | Bohr proposed that when energy is added to a hydrogen atom, its ______ moves to a higher energy orbit |
| energy levels | hydrogen atom emits a photon corresponding to the difference between the ________ associated with the two orbits it transitions between |
| atomic emissions spectrum | Bohr's model failed to explain ______ of elements other than hydrogen |
| quantum mechanical and model of the atom | the modern model of the atom that treats electrons as waves |
| Heisenberg uncertainty principle | states that it is impossible to know both the velocity and the position of the particle at the same time |
| atomic orbital | a three-dimensional region around the nucleus representing the probability of finding an electron |
| Schrodinger wave equation | originally applied to the hydrogen atom, led to the quantum mechanical model of the atom |
| Valence electrons | the electrons in an atoms outermost orbitals are called |
| atoms nucleus and inner level elecrons | in an electron-dot structure, the elements symbol represents the |
| valence electrons | which electrons are represented by the dots in an electron-dot structure? |
Created by:
maddiehaugen