CHEM 121 Chapter Notes -Ionic Bonding, Chemical Formula, Atomic Number
21 Nov 2013
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2. 6 atomic structure sodium always have 11 protons, 11 electrons isotopes atoms w/ same number of protons but different neutrons ex) 23( atomic mass total number of protons and neutrons) ^ this is written as sodium-23; 11e-, 11p+ and 12 neutrons. Co2) structural formula individual bonds shown by lines (ex h-o-h) Space-filling model show relative size of atoms ions charged atom(s) cation positive ion (ex. Na --> na+ + e-) anion -negative ion (cl + e- --> cl-: ionic bonding attraction b/w oppositely charge ions. 2,8 periodic tables group/families vertical columns of periodic table; have similar chemical properties periods horizontal rows of elements noble gases are monotonic and least reactive. If anion does not contain oxygen, acid prefix hydro and suffix ic : h cl hydrochloric acid; hcn hydrocyanic acid. Ex) when a sample of natural copper is vapourized and injected into a mass spectrometer, results in figure 3. 3 are obtained.
