Atomic Structure Name ________________ 1) The nucleus of an atom contains positively charged _____________________________. 2) The nucleus of an atom may also contained uncharged __________________________. 3) How do the masses of the proton, neutron, & electron compare to each other? 4) An ‘average’ atomic nucleus has a radius of ________________________ meters. 5) The ______________ of an atom determines its chemical behavior, but the _______________ determines its mass. 6) The ____________________ number of an atom indicates the number of protons present in the atom. 7) The ____________________ number of an atom indicates the total number of protons + neutrons present. 8) For a neutral atom, the number of protons & _____________________ must be the same. 9) Write the atomic notation (AZXcharge) for each of the particles described below. a) 8 protons, 9 neutrons, 10 electrons. b) neutral element # 92 with 146 neutrons c) the isotope of iron with 30 neutrons and 23 electrons d) atomic # = 19, mass # = 39, 18 electrons 10) Which pair(s) of particles have the same number of neutrons? a) 12C 14C b) 12C 13N c) 108Ag 108Sn d) 2H 1H 11) Write in the atomic notation, the number of protons, neutrons, and electrons that each of the following particles has from the clues given. atomic not. protons neutrons electrons 27 Al 13 ______ _______ _______ _________ __51__ __73___ __47___ 40 Ar 18 ______ _______ _______ 80 Br-1 35 ______ _______ _______ _________ __11__ __12___ __10___ 40 K+1 19 ______ _______ _______ _________ __15__ __16___ __18___ _________ __15___ __16___ __10___