1. The building blocks of matter! http://sciencespot.net/Media/atom2.jpg ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

2. http://www.uh.edu/engines/jdalton2.jpg http://nibiryukov.narod.ru/nb_pinacoteca/nb_pinacoteca_painting /nb_pinacoteca_carracci_agostino_democritus.jpg http://reich-chemistry.wikispaces.com/file/view/ 250px-Jj-thomson2.jpg/31601253/250px-Jj- thomson2.jpg http://atomic-structure.wikispaces.com/file/view/ rutherford1.jpg/178128241/rutherford1.jpg http://www.springtimepublishers. com/bp/images/Niels_Bohr.jpg ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

3. All matter is made of tiny particles called atoms Atoms are the smallest part of matter ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

4. Solid ball Daltons Atomic Theory All matter is made of atoms Atoms of same element are same, of different elements are different Atoms combine to form compound Atoms can not be broken down ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

5. Fixed electrons surrounded by positive material http://www.malebolge.net16.net/science11/plum_pudding.gif ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

6. Central positive center (nucleus) Surrounded by Electrons http://static.newworldencyclopedia.org/6/66/Rutheratom.jpg ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

7. Positive center of protons and neutrons surrounded by electrons that travel in fixed orbits http://csep10.phys.utk.edu/astr162/lect/light/bohrframe/bohr2.gif ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

8. Positive nucleus surrounded by an electron cloud where electrons are likely found http://bioap.wikispaces.com/file/view/atom.jpg/107303887/atom.jpg ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

9. All matter is made up of atoms Atoms can be broken down into smaller particles Atoms combine to form compounds *Atoms of the same element always have the same number of protons. *Atoms of the same element can have different masses. These are called “isotopes.” ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

11. Charge = positive 1 (+1) Mass = 1 amu Location inside nucleus ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

12. The number of protons in the nucleus determines the atomic number. Elements are arranged in the table by increasing atomic number Does not change http://facstaff.gpc.edu/~pgore/PhysicalScience/periodic-table.gif ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

13. Charge = none (0) Mass = 1 amu Location inside nucleus ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

14. The number of protons plus the number neutrons within the nucleus This helps identify the Isotope of the element (same Number of protons different number of neutrons) AKA: Average Atomic Mass ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

15. Represents the element name with the atomic number and mass number ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

16. Charge = negative 1 (-1) mass= 1/1836 of a proton Location orbit around the nucleus __ ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright

17. An atom is a neutral particle The net charge is zero Number of electrons = Number of protons 16 protons = 16 electrons ©2011 University of Illinois Board of Trustees http://islcs.ncsa.illinois.edu/copyright