Building an Atom

Name Date Period Group Conceptual Physics of Matter Lab 17-2: Building an Atom Chapter 17: The Atomic Nature PART I: ATOM SCREEN 1. 2. Explore the Build an Atom simulation with your group. As you explore, talk about what you find. List two things your group observed in the simulation. b. 2. 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. 3. What particle(s) are found in the center of the atom" protone neutrone 4. Play until you discover which particle(s) determine(s) the name of the element you build. prstons 5. What is the name of the following atoms? a. An atom with 3 protons and 4 neutrons: Lithium b. An atom with 2 protons and 4 neutrons: Helium An atom with 4 protons and 4 neutrons: Beryllium 6. Play with the simulation to discover which particles affect the charge of an atom or ion. protons electroxs fastons, clutions - 7. What is the charge of these particles? Fill in the blanks below to show your results: Neutral atoms have the same number of protons and electrons. b. Positive ions have more protons than electrons. c. Negative ions have fever protons than electrons. 8. Develop a relationship (in the form of a single sentence or equation) that can predict the charge based on the number and types of particle. The numbu of & protons and lectures determines the net charge of the ion or atom 9. Play with the simulation to discover what affects the mass number of your atom or ion. protons + neutrons What is a rule for determining the mass number of an atom or ion? The number of protans + nentions = mars #. 10. Practice applying your understanding by playing 1" and 2nd levels on the game screen. PART II: SYMBOL SCREEN 1. 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. dab C 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 net charge protino & elution pe Atomic number protona A C d mass mumbur Protons, neutrons 2. Create a definition (using a complete sentence) for each of these items based on your labels from the atomic symbol above. Element Symbol jie Letter on letters used to represent the name of an element. b. Charge is determined by adding + protons & - electrons c. Atomic Number in number of protons will identify the element d. Mass Number is numon of particks in nucleus (p + n) 3. Practice applying your understanding by playing the 3 3 and 4 game levels. Play until you can get all the questions correct on the 4th level. Fill in the information here for your last screen of the 4 game level: Sample 3 2 0 He protons 2 neutrons electrons 2 4. In addition to atomic symbol, we can represent atoms by name and mass number. Complete the table below: Symbol 12C+1 6 18 9 B Name Carbon-12 Fluorine-18 Brron-11 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. atomic It, mass & cheuge symbol has more info I as well as symbol for nome Name tells name & mars to only. (Name of elevent ts clue for atomic numbu) No information for charge is given. PART III: ISOTOPES 1. Play with the simulation to determine: a. Which particles affect the stability of the atom? Neutrons • pistons b. Which particles do not affect the stability of the stom? elections 2. What are the names of the stable forms of oxygen? a. Oxygen-16 b. Oxygen-17 c. Oxygen-18 3. List all of the things that are the same about these atoms (ignore the electrons). Same # of protons 4. List all of the things that are different about these atoms (ignore the electrons). Different # of enthous 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. They must be the same element (some th of p) bint have different th's of rentions. 6. Test your understanding of isotopes by examining the relationships between the pairs of atoms listed below: Atom 1 12C 6 Carbon-12 Argon-40 B 5 An atom with 13 protons and 13 neutrons Atom 2 C 12 C Argon-41 Boron-10 An atom with 14 protons and 13 neutrons Relationship between atom 1 and atom 2 Isotopes Same Atom, Not Isotopes of Each Other Different Element Isotopes Same Atom, Not Isotopes of Each Other Different Element Isotopes Same Atom, Not Isotopes of Each Other Different Element Isotopes Same Atom, Not Isotopes of Each Other Different Element Isotopes Same Atom, Not Isotopes of Each Other Different Element PART IV: REVIEW EXERCISES 1. The periodic table has a great deal of information about every atom. Using your periodic table, answer the following questions: a. What is the atomic number of chlorine (Cl)? 17 14 c. How many protons are there in any Clatom? 17 b. What is the atomic number of tungsten (W)? d. How many protons are there in any Te atom? 52