Lab #7: Building an Atom (PhET simulation) PART I: ATOM SCREENGo to the website and choose the Build an Atom simulation: http://phet.colorado.edu/en/simulation/build-an-atom1. Click on the + sign for each of the boxes (element name, net charge and mass number) to view changes as you change the number of particles in the atom.2. What particle(s) are found in the center of the atom? _________________________________________________________3. Play until you discover which particle(s) determine(s) the name of the element you build. ___________________________4. What is the name of the following atoms?a. An atom with 3 protons and 4 neutrons: _____________b. An atom with 2 protons and 4 neutrons: _____________c. An atom with 4 protons and 4 neutrons: _____________5. Play with the simulation to discover which particles affect the charge of an atom or ion. _____________________________6. Fill in the blanks below to show your results:a. Neutral atoms have the same number of protons and electrons.b. Positive ions have ________________________________ protons than electrons.c. Negative ions have _______________________________ protons than electrons. PART II: SYMBOL SCREEN1. Using the Symbol readout box, figure out which particles affect each component of the atomic symbol and how the value of the numbers is determined. Position in symbol box Term to describe this information Particle used to determine this How the value is determined Element symbol protons # of p will identify the element p+ + e-c Atomic numbers Protons, neutrons2. Create a definition (using a complete sentence) for each of these items based on your labels from the atomic symbol above.a. Element Symbol b. Charge c. Atomic Number d. Mass Number 3. In addition to atomic symbol, we can represent atoms by name and mass number. Complete the table below: Symbol Name Carbon-12 a) Each representation (Symbol and Name) in the table above provides information about the atom. Describe the similarities and differences between the Symbol and Name representations. PART III: ISOTOPES1. Play with the simulation to determine:a. Which particles affect the stability of the atom? _____________________b. Which particles do not affect the stability of the atom? _______________2. What are the names of the stable forms of oxygen?a. Oxygen-16b. Oxygen-____c. Oxygen-____3. List all of the things that are the same about these atoms (ignore the electrons). 4. List all of the things that are different about these atoms (ignore the electrons). 5. The atoms in the previous question are isotopes of each other. Based on this information, list the requirements for two atoms to be isotopes of each other. 6. Test your understanding of isotopes by examining the relationships between the pairs of atoms listed below: Atom 1 Atom 2 Relationship between atom 1 and atom 2IsotopesSame Atom, Not Isotopes of Each Other Different Element Carbon-12 Isotopes Same Atom, Not Isotopes of Each Other different Element Argon-40 Argon-41 IsotopesS ame Atom, Not Isotopes of Each Other Different Element Boron-10 Isotopes Same Atom, Not Isotopes of Each Other Different Element An atom with 13 protons and 13 neutrons An atom with 14 protons and 13 neutrons Isotopes Same Atom, Not Isotopes of Each Other Different Element
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