tuesday, august 27, 2013
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DESCRIPTIONTuesday, August 27, 2013. 3.a. Students know the structure of the atom. Questions:. Draw the Bohr model for Titanium. How did you know where to place the electrons around the nucleus?. 22 Ti Titanium 47.87. Today ’ s Agenda. Journal History of the Atom Quiz Cornell Notes – The Atom - PowerPoint PPT Presentation
Tuesday, August 27, 20133.a. Students know the structure of the atom.
22TiTitanium47.87Questions:Draw the Bohr model for Titanium.How did you know where to place the electrons around the nucleus?
Todays AgendaJournalHistory of the Atom QuizCornell Notes The AtomCarbon Isotopes ModelIP: Protons, Neutrons, and Electrons WS and Finish Cornell Notes
Periodic Table of Elements
ElementsScience has come along way since Aristotles theory of Air, Water, Fire, and Earth.Scientists have identified 90 naturally occurring elements, and created about 28 others.
ElementsThe elements, alone or in combinations, make up our bodies, our world, our sun, and in fact, the entire universe.
The most abundant element in the earths crust is oxygen.
Key to the Periodic TableElements are organized on the table according to their atomic number, usually found near the top of the square.The atomic number refers to how many protons an atom of that element has.For instance, hydrogen has 1 proton, so its atomic number is 1.The atomic number is unique to that element. No two elements have the same atomic number.
Whats in a square?Different periodic tables can include various bits of information, but usually:atomic numbersymbolatomic massnumber of valence electronsstate of matter at room temperature.
Atomic NumberThis refers to how many protons an atom of that element has.No two elements, have the same number of protons.Bohr Model of Hydrogen AtomWave Model
Atomic MassAtomic Mass refers to the weight of the atom.It is derived at by adding the number of protons with the number of neutrons. HThis is a helium atom. Its atomic mass is 4 (protons plus neutrons).
What is its atomic number?
Atomic Mass and IsotopesWhile most atoms have the same number of protons and neutrons, some dont.Some atoms have more or less neutrons than protons. These are called isotopes. An atomic mass number with a decimal is the total of the number of protons plus the average number of neutrons.
Carbon Isotope ChartCopy and complete the chart above into your notes.
IsotopeSymbolAtomic NumberNumber of NeutronsMass NumberRadioactive?Carbon-12C-1212NoCarbon-13C-1313NoCarbon-14C-1414Yes
Atomic Mass Unit (AMU)The unit of measurement for an atom is an AMU. It stands for atomic mass unit.One AMU is equal to the mass of one proton.
Atomic Mass Unit (AMU)There are 6 X 1023 or 600,000,000,000,000,000,000,000 amus in one gram.(Remember that electrons are 2000 times smaller than one amu).
SymbolsAll elements have their own unique symbol.It can consist of a single capital letter, or a capital letter and one or two lower case letters.CCarbonCuCopper
Common Elements and Symbols
Carbon Isotope ModelsWe are going to practice making Bohr models and demonstrate our understanding of isotopes, by creating carbon isotope models.
You Will NeedOne yellow paper as background.One sheet of Parts of an AtomOne index card for summary.ScissorsGlue
ProcedureCopy the completed carbon isotope chart from your notes onto the top of the yellow paper.Cut out the parts of the atom and make three complete Bohr models, one for each model (make sure you label it). Be creative but accurate!On the index card, write a summary about what isotopes are (5-7 sentences) and staple it to the bottom.
Independent Practice:Protons, Neutrons, and ElectronsFinish Cornell NotesProtons, Neutrons, and Electrons