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what is the equation for energy? E=hv or E=hc/(lambda) From high energy to low energy name the electromagnetic radiation Gamma, X-rays, Ultraviolet, Visible, Infrared, Microwaves, Radio waves From longest wavelength to shortest name the electromagnetic radiation Radio, Microwaves, Infrared Visible, Ultraviolet, X-rays, Gamma Balmer-Rydberg equation 1/(lambda)=R[1/(m^2)-1/(n^2)] m= where an electron ended up n=where an electron started Principal Quantum Number symbolized by n, indicates the main energy level occupied by the electron Angular Momentum Quantum Number the quantum number that indicates the shape of the orbital Magnetic Quantum Number Gives the orientation in 3-dimensional space s orbital shape spherical p orbital shape dumbbell shaped Pauli Exclusion Principal no two electrons in the same atom can have the same set of four quantum numbers Aufbau Principle electrons enter orbitals of lowest energy first, each orbital can only hold 2 electrons and the electrons must have opposite spins Hunds rule If 2 or more orbitals have the same energy, 1 electron goes into each orbital until all are half filled then start pairing electrons with opposite spins What is the period trend with respect to size? The size of an atom increases going down a group, the size of an atom decreases going across a period (left to right) How do you do electron configuration of ions? For main group elements you add or remove electrons to get a noble gas configuration. For ex: Na=[Ne] 3s^1 Na+=[Ne] Ionization energy the amount of energy required to remove an electron from an atom what it the ionization energy trend? decreases going down a group, increases left to right across the periodic table Electron affinity The amount of energy required to add an electron to an isolated atom in the gas phase