Atoms, Atoms Everywhere! Atoms, Atoms Everywhere! The History of Atomic Models.
Drawing Atoms
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Drawing Atoms
Drawing AtomsDescription of Element Squares
Atomic NumberNumber of ProtonsNumber of ElectronsAtomic MassProtons + Neutrons#Neutrons = Atomic Mass Atomic Number
Filling Electron Shells2n2N = electron shellExample: 1st electron shellN = 12(1)2 = 21st shell will hold 2 electronsFilling Electron Shells2n21st Shell:2(1)2 = 2 electrons2nd Shell:2(2)2 = 8 electrons3rd Shell:2(3)2 = 18 electrons4th Shell:2(4)2 = 32 electrons5th Shell:2(5)2 = 50 electrons
Drawing an AtomHow many electrons?2What element?Helium!Atomic Mass?4# Neutrons?4 2 = 2Nucleus(protons +neutrons)
Drawing an AtomHow many electrons?6What element?Carbon!Atomic Mass?12# Neutrons?12 6 = 6Nucleus(protons +neutrons)
Drawing an AtomHow many electrons?11What element?Sodium!Atomic Mass?23# Neutrons?23 11 = 12Nucleus(protons +neutrons)