# Kaplan GenChem atomic structures Chapter 1

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Mass # and Atomic # positions on element mAss # on top left (pro+neut)Atomic # on bottom left (prot)(On periodic table, the atomic # is listed ontop of element) Isotope calculating strategy ie: Chlorine-35 and Chlorine-37 are 3:1 ratio35(.66) + 37(.33) = atomic weight of chlorine = 32 Pauli exclusion principle no 2 electrons in a given atom can have the same four quantum numbers 4 quantum numbers principal (n)2nd is azimuthal (angular momentum) (l)3rd is magnetic quantum number (ml)4th is spin quantum number (ms) Spin quantum number rules 2 electrons in SAME orbital must have opposite spinsElectrons in diff orbitals with same ms values have parallel spins electron spin: can be +1/2 or -1/2 (have to fill orbitals with one electron first, then can pair up) magnetic quantum number rules possible values: can be range from l to -l (for p, -1, 0, +1) azdimuthal (angular momentum) quantum number rules refers to the subshells or sublevels (l) for value of n, subshell (l) can be from 0 to n-10,1,2,3, representing s,p,d,f max # of electrons in subshell = 4l +2 principal quantum number rules Max # of electrons in energy level n = 2n^2larger the n integer, the higher energy level and radius of electron orbitenergy diff from 1-2 is greater than 2-3 and so on going higher up with the values of n Bohr model E=hfh=Planck's constant (6.626 x 10-34 Js)f = frequency of radiation Atomic emissions spectra - energy of photons equation E = hc/wavelengthh=Planck's constantc=speed of light (3x108m/s) Planck's constant 6.626 x 10-34 Js Calculating energy emitted when going from n=3 to n=2 E = - RH (1/[ni^2] - 1/[nf^2])should be positive value due to going back towards ground state and energy is being released Calculating energy emitted when n=2 E = - RH/n^2 Balmer vs Lyman series Balmer are emissions from n>2 to n=2 (4 wavelengths in visible region)Lyman series are from n>1 to n=1 (the UV region) What are atoms with the same atomic number, but different atomic mass Isotopes of each other .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Authorrincrocci ID353722 Card SetKaplan GenChem atomic structures Chapter 1 DescriptionGen chem Atomic structures DAT studying Updated2020-11-11T16:34:06Z Show Answers