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Atomic Structur

QuestionAnswer
Bohr Model electrons travel in special orbits around the nucleus; they have a fixed energy
Quantum Mechanical Model electrons can be found in specific regions 90% of the time
Energy Level the region of an electron around the nucleus where the electron is likely to be moving
Quantum of energy amount of energy required to move electron from its present energy level to the higher one
Orbit fixed path that the electron follows
Orbital where the electrons can be found 90% of the time
Aufbau Principle electrons enter orbitals of lowest energy first
Pauli Exclusion Principle no two electrons can have the same set of 4 quantum numbers; an electron orbital may describe at most two electrons
Hund's Rule electrons enter orbitals singly and only double up after each possible orbital contains 1 electron
Electromagnetic Radiation Radio, micro, infrared, visible, ultraviolet, x-rays, gamma
Visible Light Red, Orange, Yellow, Green, Blue, Indigo, Violet
Wavelength units m, cm, nm
Frequency units Hz, 1/s, s^-1
Speed of Light 3.00 x 10^8 m/s
Atomic Emission Spectrum pattern of frequencies; obtained by passing light emitted by atoms in the gaseous state
Photons bundles of electromagnetic energy which behave as particles; also - a quantum of light
Photoelectric Effect electrons are ejected by certain metals when they absorb light w/ a frequency ABOVE a threshold frequency
Heisenberg Uncertainty Principle it is impossible to know both the velocity and the positions of a particle at the same time
Created by: v