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RHSA SNC1D:Chemistry Name: _______________ Sub-atomic Particles Atoms contain three important subatomic particles. Particle Location Mass Charge How Name determined? Proton inside the 1 +1 = Atomic nucleus Number Neutron inside the 1 0 = Atomic Mass – nucleus Atomic Number Electron orbiting nearly -1 = Atomic Number outside the 0 nucleus Standard atomic notation always shows the atomic mass in the upper left corner above the element symbol, with the atomic number in the bottom left corner. For carbon the standard atomic notation is: Atomic Mass Atomic Number 12 6 C RHSA SNC1D:Chemistry Name: _______________ Modern Model of the Atom Carbon has 6 protons, 6 neutrons and 6 electrons. The modern model of the carbon atom looks like: Let’s try it to put it all together – complete this chart! Element beryllium aluminum fluorine Atomic Mass Atomic Number # of Protons # of Electrons # of Neutrons 9 4 4 4 9-4=5 Standard Atomic Notation 9 4 Be RHSA SNC1D:Chemistry Element Atomic Mass Name: _______________ Atomic Number # of Protons # of Electrons # of Neutrons Standard Atomic Notation beryllium 9 4 4 4 9-4=5 9 4 aluminum 27 13 13 13 27-13=14 27 13 Al fluorine 19 9 9 9 19-9-10 19 9 F Be RHSA SNC1D:Chemistry Name: _______________ Sub-atomic Particles Atoms contain three important subatomic particles. Particle Name Proton Location Mass Charge How determined? Neutron Electron Standard atomic notation always shows the ______________________in the upper left corner above the element symbol, with the ______________________ in the bottom left corner. For carbon the standard atomic notation is: Atomic Mass Atomic Number 12 6 C Modern Model of the Atom Carbon has __________ protons, ________ neutrons and _________ electrons. The modern model of the carbon atom looks like: RHSA SNC1D:Chemistry Name: _______________ Let’s try it to put it all together – complete this chart! Element Atomic Mass Atomic Number # of Protons # of Electrons # of Neutrons beryllium 9 4 4 4 9-4=5 Standard Atomic Notation 9 4 Be aluminum fluorine Complete the subatomic particles worksheet. Complete the worksheet on the history of the development of the modern model of the atom. Read p 87 – 89 and do p 89 #2,3 RHSA SNC1D:Chemistry Name: _______________ Subatomic Particles Worksheet Element Symbol Helium He Oxygen O Sodium Atomic Number 2 Atomic Mass 4 16 11 Chlorine # of Protons # of Electrons 8 O 17 Calcium 20 7 32 Si Silver Ag Uranium U 92 6 16 14 Argon 20 4 6 Sulfur 14 40 18 108 47 238 He 16 8 23 C Standard Atomic Notation 4 2 35 Li # of Neutrons RHSA SNC1D:Chemistry Name: _______________ HISTORY – DEVELOPING A MODEL OF THE ATOM V2 Read text p 84 –85, 87, 91-92. Write a short point form summary of the important idea or discovery. Sketch the matching diagram. The ideas are not always presented in order in the textbook. SCIENTIST John Dalton YEAR Michael Faraday DIAGRAM None J.J. Thomson Nagaoka MOST IMPORTANT IDEA(S) or DISCOVERY 1904 RHSA SNC1D:Chemistry SCIENTIST Ernest Rutherford YEAR Niels Bohr 1921 James Chadwick Name: _______________ MOST IMPORTANT IDEA(S) or DISCOVERY DIAGRAM Conclusion – The Nuclear Model None