Build an Atom Worksheet

Pre-lab for build an Atom 1. You build an atom that has the following components: 3 protons P 4 neutrons N 3 electrons E Draw a picture of how you would build your atom below: Circle which element this atom is on this periodic table below: O 00 The mass of this atom is: a. 3 mass units b. 4 mass units c. 6 mass units d. 7 mass units e. 11 mass units 0 O Explain what ideas you used to choose an answer: ____________________________________________________ itgoes up in atomic Usually ____________________________________________________ mass horizontally The charge of this atom is: a. 0, this is a neutral atom b. -3 c. -1 0d. +1 e. +3 Ad 10/24/2011 Moore and Paul http://phet.colorado.edu Page 1 2. You start with your atom: 3 protons 4 neutrons 3 electrons You want to change your atom’s properties. Mark YES if a change will work, and mark NO if it will not work. A. Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon are all different elements. If you want to change the type of element your atom is, you can either: (circle) Add a proton Yes or No or Add a neutron Yes or No or Add an electron Yes or No 08 B. If you want to change the charge of your atom, you can either: (circle) Add a proton Yes or No O or Add a neutron Yes or No O or Add an electron Yes or No O C. If you want to change the mass of your atom, you can either: (circle) Add a proton Yes O or No or Add a neutron Yes or O No or Add an electron Yes or No O 10/24/2011 Moore and Paul http://phet.colorado.edu Page 2 Name: ______________________________ Period: _______________ Build an Atom Learning Objectives: 1. Draw models that show atoms or ions. 2. Use information about the number of protons, neutrons, and electrons to • Identify an element and its position on the periodic table • Draw models of atoms • Determine if the model is for a atom or an ion. 3. Predict how changing the number protons, neutrons, or electrons will change the element, the charge, and the mass of an atom or ion. Directions: 3. Explore the Build an Atom simulation with your partner (about 5 minutes). As you explore, talk about what you find with your partner. 4. Using Build an Atom, talk with your partner as you play with the parts of atoms to find: Proteas A. What parts go in the center of the atom? _________________________________________ Neutrons B. You can call the center of the atom, the nucleus. Most atoms in our environment have a stable nucleus. C. Play around, and write down three examples of atoms that have a stable nucleus and include a drawing of your nucleus. ! Number!of!particles!in!! your!nucleus:! 1.# Protons:#__# Neutrons:__# # 2.# # Protons:#__# Neutrons:__# # # 3.# # Protons:#__# Neutrons:__# # # 8 10/24/2011 Moore and Paul 4 Draw!! your!nucleus! # # # # # # # # What!element!! is!it?!! # helium # Lithium # # # # # http://phet.colorado.edu Beryllium Page 3 D. Everything around us is made up of different elements. The air has Oxygen (O) and Nitrogen (N). Plants and people have lots of Carbon (C). Helium (He) is in balloons. Hydrogen (H) is in water. Play until you discover which particle (or particles) determines the name of the element you build. What did you discover? ___________________________________________________________________________ 10N E 0 8P IO E. Test your idea by identifying the element for the 3 cases. ! Particles! What! What!Determines! Element?!! the!Element?! Protons:#6## # !Proton# 1.# Neutrons:#6# Carbon !Neutron# Electrons:#6# !Electron# Protons:#7## # !Proton# 2.# Neutrons:#6# Nitrogen !Neutron# Electrons:#6# !Electron# Protons:#6## # !Proton# 3.# Neutrons:#7# !Neutron# Carbon Electrons:#7# !Electron# Circle!the!Element! 0 # J # o # 5. Play until you discover what affects the charge of your atom or ion. What is a rule for making... A. A atom neutral (one with 0 extra charge)? ______________________________________________________________________________ P 7 7 7N E Nitrogen B. A +ion (positive ion, one with extra positive charge)? ______________________________________________________________________________ Lithium 3P IN C. A - ion (negative ion, one with extra negative charge)? ______________________________________________________________________________ 2N 4 E Lithium 3P 6. Show a neutral atom, a positive ion, and a negative ion. (These examples should be consistent with the rules you discovered.) All of your examples should also have a stable nucleus. ! Number!of!Particles?! Neutral# Protons:#__# Neutrons:__# Electrons:__# # +#Ion# Protons:#__# 4 Neutrons:__# 3 Electrons:__# 3 # 9#Ion# Protons:#__# Neutrons:__# Electrons:__# 4 # 10/24/2011 Moore and Paul Draw!Your!! Atom!or!Ion! http://phet.colorado.edu What!is!! the!Charge?! O# t I # I# Page 4 7. Play until you discover what affects the mass of your atom or ion. Which particles are heavy and which particles are light? _________________________________________________________________________________ Electrons Protens t Neutrons heavy light What is a rule for determining the mass? _________________________________________________________________________________ of protons t neutrons 8. Using all of your rules, figure out what changes for each of these actions to an atom or ion. You can test your ideas with the simulation. If you have new ideas, rewrite your rules. Action! Add#a# Proton# Action! Remove#a# Neutron# Action! Remove#an# Electron# Action! Add#a# Electron# What! Changes?! !Element# !Charge# !Mass# What! Changes?! !Element# !Charge# !Mass# What! Changes?! !Element# !Charge# !Mass# What! Changes?! !Element# !Charge# !Mass# 10/24/2011 Moore and Paul How!Does!it!Change?! Hydrogen into Helium# # # How!Does!it!Change?! Same # # # Same 1 How!Does!it!Change?! Same # # # I same How!Does!it!Change?! same I same http://phet.colorado.edu # # # Page 5 9. Challenges! Design a positive ion with a charge of +2: Particles! Properties! Protons:#__# Neutrons:__# 2 Electrons:__# g # Element:__# Helium He Mass:__# 4 Charge:__# 2 Stable#Nucleus:# !Yes# !No# Design a neutral, atom with a mass of 8: Particles! Properties! Protons:#__# 4 Neutrons:__# 4 Electrons:__# 4 # 10/24/2011 Moore and Paul Element:__# Beryllium Be Mass:__# 8 Charge:__# O Stable#Nucleus:# !Yes# !No# http://phet.colorado.edu Page 6 Name: ______________________________ Period: _______________ Post-lab for Build an Atom 10. You build an atom that has the following components: 3 protons P 4 neutrons N 3 electrons E Draw a picture of how you would build your atom below: Circle which element this atom is on this periodic table below: The mass of this atom is: f. 3 mass units g. 4 mass units h. 6 mass units i. 7 mass units j. 11 mass units Explain what ideas you used to choose an answer: ____________________________________________________ Combined the protons ____________________________________________________ neutrons equal 7 The charge of this atom is: f. 0, this is a neutral atom g. -3 h. -1 i. +1 j. +3 10/24/2011 Moore and Paul http://phet.colorado.edu Page 7 11. You start with your atom: 3 protons 4 neutrons 3 electrons You want to change your atom’s properties. Mark YES if a change will work, and mark NO if it will not work. A. Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon are all different elements. If you want to change the type of element your atom is, you can either: (circle) Add a proton Yes or No or Add a neutron Yes or No or Add an electron Yes or No 08 Explain the ideas you used to choose your answer: _____________________________________________________________________ It is still Lithium _____________________________________________________________________ B. If you want to change the charge of your atom, you can either: (circle) Add a proton Yes or No or Add a neutron Yes or No or Add an electron Yes or No 00 O Explain the ideas you used to choose your answer: _____________________________________________________________________ Proteus Neutrons increase chargeelectrons _____________________________________________________________________ had lower no effect C. If you want to change the mass of your atom by 1 or more mass units, you can either: (circle) Add a proton Yes or No or Add a neutron Yes or No or Add an electron Yes or No 80 Explain the ideas you used to choose your answer: _____________________________________________________________________ Electrons are while Pro Nee add weight _____________________________________________________________________ light D. If you add 1 proton and 1 neutron to your atom … Yes Will the element change? ____ If so, circle the new element? O Will the mass change? _____ yes If so, what is the new mass of the atom? ________ Will the charge change? ____ If so, what is the new charge of the atom?________ H yes 10/24/2011 Moore and Paul http://phet.colorado.edu Page 8