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Stack #106108
| Question | Answer |
|---|---|
| electromagnestic radiation | radiant energy that exhibits wavelike properties and travels through space at the speed of light in a vacuum |
| wavelength | the distance between two consecutive peaks or troughs in a wave |
| frequency | the number of waves pers second that pass a given point in space |
| units for frequency | 1/sec or hertz |
| symbol for frequency | v |
| symbol for wavelength | lamda |
| speed of light | 3x10 to the 8th m/s |
| photon | a particle of light |
| e equals | 6.626x10 to the -34 times frequency |
| visibile light spectrum | 400 nm to 700 nm, violet to red. |
| speed of light is | wavelength times frequency |
| equation to represent this phenomenom | -2.178x10 times (1/n2final- 1/n2initial) |
| principal quantum number | the quantum number relating to the size and energy of an orbita; it can have nay positive integer value |
| angular momentum quantum number | the quantum number relating to the shape of an atomic orbital which can assume any integral value from 0 to n-1 for each value of n |
| magnetic quantum numbe | the quantum number relating to the orientation of an orbital in spce relative to the other orbitals with the same l value. it can have integral values from -l to l, including zero |
| electron spin uantum number | a quantum number repreating one of the two possible values for the electron spin, either 1/2 or -1/2 |
| s | 0 |
| p | 1 |
| d | 2 |
| f | 3 |
| heisenberg uncertainity principle | there is a fundamental limitation to how precisely both the position and momentum of a particle can be known at a given time |
| aufbau principle | as protons are added one by one to the neucleus to build up elements, electrons are similarly added to ortbials. An electron must occupy the lowest possible enrgy orbital. |
| pauli exclusion principle | in a given atom, no two electrons can have the same set of four quantum numbers |
| hunds rule | the lowest energy configuration for an ato is the one having the max number of unpaired electrons allowed by the pauli exclusion principle in a particular set of degenerate orbitas, orbitals in the same energy level and sublevel, with all the unpaired ele |
| ground state | the lowest possible energy state of an atom |
| excited state | an energy state higher than the ground state of an atom. an outside source of energy must be supplied to reach this state. |
| valence electrons | the electrons in the outermost principal quantum level of an atom |
| core electron | an inner electron in an atom |
| paramagnetism | a type of induced magnetism, associated with unpaired electrons, that causes a substance to be attracted into the inducing magnetic field |
| diamagnetism | a type of magnetism, associated with paired electrons, that causes a substance to be repelled from the inducting magnetic field. |
| atomic radius | half othe distance between 2 radii in a covalently bonded diatomic molecule |
| ionaization energy | the energy required to remove one electron from an atom |
| electron affinity | tthe energy change asscoaited with the addition of an electron to a gaseous atom |
| electronegativity | the tendency of an atom in a molecule to attract shared eletrons to itself |
Created by:
lilee256