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Chem Ch.5

chapter 5

energy level the specific energies an electron in an atom or other system can have
quantum mechanical model the modern description primarily mathematical of the behavior of the electrons in atoms
atomic orbital a mathematical expression describing the probability of finding an electron at various locations usually represented by the region of space around the nucleus where there is a high probability of finding an electron
electron configurations the arrangement of electrons of an atom in its ground state into various orbitals around the nuclei of atoms
Aufbau principle the rule that electrons occupy the orbitals of lowest energy first
Pauli exclusion principle an atomic orbital may describe at most two e electrons each with opposite spin direction
hund's rule electrons occupy orbitals of the same energy in a way that makes the number or elect with the same spin direction as large as possible
electromagnetic radiation energy waves that travel in vacuum at a speed of 3.00 x 10^8 m/s includes radio waves microwaves infrared waves visible light ultraviolet waves x-rays and gamma rays
amplitude the hight of a wave's crest
wavelength the distance between adjacent crests of a wave
frequency the number of wave cycles that pass a given point per unit of time frequency and wavelength are inversely proportional to each other
hertz the unit of frequency equal to one cycle per second
spectrum wavelengths of visible light that are separated when a beam of light passes through a prism range of wavelengths of electromagnetic radiation
atomic emission spectrum the pattern formed when light passes through a prism or diffraction grating to separate it into the different frequencies of light it contains
ground satte the lowest possible energy of an atom described by quantum mechanics
photons a quantum of light a discrete bundle of electromagnetic energy that interacts with matter similarly to particles
Heisenberg uncertainty principle it is impossible to know exactly both the velocity and the position of a particle at the same time
Electromagnetic radiation C= wavelength X frequency .........C= The speed of light 3.0X10^8
Directly related frequency and energy
Planck Constant E=n h v.......... H=Planck's constant= 6.626x10^-34 Js
Energy level n=1-2e- n=2-8e- n=3-18e- n=4-32e- n=5-50e- n=6-72e- n=7-98e-
SubLevels s= spherical p=peanut d=double peanut f=flower
Orbital s=1 p=3 d=5 f=7 (Think All are ODD numbers)
quantum the amount of energy needed to move an electron from one energy level to another
Created by: KatReid



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