Inorganic Chemistry Flashcards
What way can electromagnetic radiation be characterized
In terms of frequency and or wavelength
What is the order of the electromagnetic spectrum
Gamma, X-Rays, Ultraviolet, visible, infrared, radio
What units are wavelengths given in
Nano meters
What property is electromagnetic radiation said to have and why
It is said to have dual nature because it can behave as a wave or as a particle
Photon
A stream of particles that is given off when electromagnetic radiation is absorbed or emitted.
What happens when a photon is absorbed or emitted
Energy is gained or lost by electrons within the substance.
Energy associated with one mole of photons formula
E=Lhf or E=Lhc/wavelength
What happens when energy is transferred to atoms
Electrons may be promoted to higher energy levels
When is a photon emitted
When an excited electron moves from a higher energy level to a lower energy level.
This light energy emitted produces a spectrum made up of a series of lines at discrete energy levels.
What can the atomic emission spectrum be used for
Used to quantify and identify specific elements as each produces a specific absorption and emission soectra
Absorption spectroscopy
When EM radiation is directed at an atomized sample. Radiation is absorbed as electrons are promoted to higher energy levels.
Emission Spectroscopy
High temperatures are used to excite th electrons within atoms. As the electrons drop to lower energy levels photons are emitted. An emission spectrum is produced by measuring the intensity of light emitted at different wavelengths.
Different orbital shapes
S,P,D,F
Quantum number n
Indicates the main energy level for an electron and related to the size of the orbital
Angular momentum quantum number l
Determines the shape of the sub shell and have values from 0 to n-1
The magnetic quantum number m1
Determines the orientation of the orbital and can have values between -l and +l
The spin magnetic quantum number ms
Determines the direction of spin and can have a value of +1/2 or -1/2
Aufbau Principle
Electrons fill orbitals in order of increasing energy