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Electrons Intro

QuestionAnswer
sum of protons and neutrons atomic mass number
center of an atom ; holds protons and neutrons nucleus
diagram of only the valence electrons using dots Lewis Dot Structure
diagram of all (total) electrons using rings and dots Bohr Model
change in the number of electrons ion
outermost electrons valence electrons
inner electrons core electrons
tells number of electron shells period number
tells number of valence electrons group number (__A)
indirectly tells the number of all electrons atomic number
max number of electrons that can be in the inner most electron shell 2
max number of electrons in any electron shell past the first 8
collective name for elements in the s and p block (minus group 18) representative elements
is the exception in group 8A Helium [He]
is the exception in group 1A Hydrogen [H]
same number of protons, but different number of neutrons isotope
aka 5A ; has 5 valence electrons Group 15
aka 7A ; has 7 valence electrons Group 17
aka 2A ; has 2 valence electrons Group 2
aka 1A ; has 1 valence electrons Group 1
only group with a full s and full p atomic orbitals Group 18
aka 4A ; has 4 valence electrons Group 4
diagram of all (total) electrons using exponents shorthand Electron configuration
block with max of 2 electrons s block
block with max of 6 electrons p block
block with max of 10 electrons d block
block with max of 14 electrons f block
diagram of all (total) electrons using arrows longhand Electron configuration
said electrons are placed in lowest energy levels first (increasing energy) Aufbau
said 2 is max number of electrons per orbital ; must have opposite spins Pauli
said electrons must have the same parallel spin until each orbital has 1 electron Hund
period minus 1 , 5 > 4 and 10 > 9 d block rules for e. configurations
Created by: cadetjt
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