Concepts for 7.1-7.5 Flashcards
Understand conceptual aspects of sections 7.1-7.5
Wave
Vibrating disturbance by which energy is transmitted
Wavelength
The distance between identical points on successive waves
Frequency
Number of waves that pass through a particular point in one second
Amplitude
Vertical distance from the midline of a wave to the peak or trough
Electromagnetic wave
Electric field component and a magnetic field component
Maxwll’s theory
Mathematical description of the general behavior of light.
Electromagnetic radiation
Emission and transmission of energy in the form of electromagnetic waves
Electromagnetic waves
Speed of light
Quantum
Smallest quantity of energy that can be emitted (or absorbed) in the form of electromagnetic radiation
Photoelectric effect
Electrons are ejected from the surface of certain metals exposed to light of at least a certain minimum frequency (threshold frequency)
Photons
Particles of light
Atomic emission Spectra
Either continuous or line spectra of radiation emitted by substances
Line spectra
Light emission only at specific wavelengths
Color
Tells us the wavelength, frequency, and energy being emitted
Ground state (ground level)
Lowest energy state of a system
Excited state (excited level)
Higher in energy than the ground state
Endothermic
Energy is required for an electron to move to an orbit that is further from the nucleus than its current orbit
Exothermic
Energy is released when an electron moves to an orbit closer to the nucleus than its current oribit
De Broglie equation
All matter can be described as having wave properties
Standing waves
Stationary waves, remains fixed
Electron density
The probability that an electron will be formed in a particular region of an atom
Atomic orbital
The wave function of an electron in an atom
Orbit
Bohr, 2 dimensinal
Orbital
3 dimensional, sphere
