Atoms and the Periodic Table Chapter 12 Pages 285 305 Atoms are small Smaller than light waves Periodic table Actual arrangement doesn t fit on page very well Periodic Table Atomic symbol Only first letter is capital CO is not cobalt Co Cloud Model of Atom Atomic Structure Protons Neutrons Electrons Atomic Structure Protons Electrical charge 1 Equal number of negative electrons Balance to zero charge Atomic number is of protons Mass 1 atomic mass unit amu Atomic Structure Neutrons Electrical charge 0 Mass 1 atomic mass unit amu Number of neutrons is not set for an atom of an element Atomic Structure Nucleus Protons set number determines the element Neutrons no set number can be different for same element Make up the NUCLEUS NEW KLEE US Nucleons have mass NEW KLEE ONS Atomic Structure Electrons Electrical charge 1 Mass almost nothing 1 1837 of a proton Atomic model analogy http www sportslighting com feature ls html Analogy of atom cont http www joesentell com panther panther htm http web ics purdue edu drhodes hort410 vgsd13 htm http www skynet ie ceason cormac stuff housefly anim gif Isotope notation Stable Isotope of Sodium Atomic number is protons 11 Mass 23 nucleons is isotope Periodic Table coding Metals metalloids and nonmetals aaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaa Periods and Groups Atomic size across periods Groups families Shell Model of Atoms Electrons shells in periodic table First three periods Electron waves Certain energy and location function of wavelength right diagram is not sustainable Atomic Structure Electrons Modeled in energy shells First shell 2 electrons Second shell 8 electrons Third shell 8 electrons Periodic Table Metals nonmetals and metalloids Inner transition metals Analogy of atom cont http www joesentell com panther panther htm http web ics purdue edu drhodes hort410 vgsd13 htm http www skynet ie ceason cormac stuff housefly anim gif
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