Atoms are small Smaller than light waves Atoms and the Periodic Table Chapter 12 Pages 285 305 Periodic table Atomic symbol Actual arrangement doesn t fit on page very well Cloud Model of Atom Periodic Table Atomic Structure Protons Neutrons Electrons Only first letter is capital CO is not cobalt Co 1 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 Electrons 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 model analogy Electrical charge 1 Mass almost nothing 1 1837 of a proton 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 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 http www sportslighting com feature ls html Isotope notation Periodic Table coding Metals metalloids and nonmetals aaaaaaaaaaaaaaaaaa Periods and Groups aaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaa Stable Isotope of Sodium Atomic number is protons 11 Mass number of nucleons is isotope 23 2 Atomic size across periods Groups families Shell Model of Atoms Electrons shells in periodic table Electron waves Atomic Structure Electrons First three periods Modeled in energy shells First shell 2 electrons Second shell 8 electrons Third shell 8 electrons Certain energy and location function of wavelength right diagram is not sustainable Periodic Table Inner transition metals Analogy of atom cont Metals nonmetals and metalloids 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 3
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