Name : **5 (1/ Build An Atom PhET Lab ( edited Dec 2010 ) Introduction: Atoms are the smallest things that retain the properties of matter we can observe . *» ^ *& Staid An Atom Atoms are made of three subatomic particles; protons, neutrons, and electrons. • Protons have a mass of _ I i • Neutrons have a mass of • Electrons have a mass of nearly nm amu and a charge of _ amu and a charge of 0 Q amu and a charge of In this simulation, you will build atoms, subatomic particle by subatomic particle and observe the effect of adding more of each particle. When the subatomic particles in an atom change, an ion, isotope or different element will be created. -3 Procedure: Play with the Sims Chemistry Build An Atom 8thB \4mf i Begin by playing with the simulation for a while. Become familiar with the interface. What happens when you add protons, neutrons, or electrons ? To start over, click Reset All. A * r „ Show the symbol, atomic mass, and charge by clicking on the Analysis Questions Electrons er 1. Ions are atoms of the same element with different numbers of 2. Isotopes are atoms of the same element with different numbers of Adding or removing protons from an atom does what to the atom ? 3. 4. A C A) 5. 6. An atom with six protons and five electrons would have a charge of 7. What atom is created with nine protons, nine neutrons, and nine electrons ? 8. Show the full symbol for the above atom in the box at the right What does the upper - left number in the symbol represent ? 1 1 Get your build on! Atom or Ion has What Element is it ? # of protons: 6 # of neutrons: 6 # of electrons: 6 # of protons : 7 # of neutrons: 6 # of electrons: 6 # of protons : 6 # of neutrons: 7 # of electrons: 7 ca r be n o - ft -H 1 e> \£ CC\ rican * » ( C. / P r f \\ TX F ( 0U f => 10. What does the lower - left number in the symbol represent ? tVvf.. " An atom with the same number of protons and electrons has a charge of Adding two electrons to a neutral atom produces an ion with a charge of 9. ^3. \ IS r 1 o these changes to an atom or ion. Copy this table and make predictions, then test your ideas with the simulation . If you have new ideas, rewrite your rules. Using ail of your rules , figure out what changes for each of Make the change: Add a proton Remove a neutron Remove an electron Add an electron What changes also ? Element name, charge, mass ? eW me y y f ncmia . wv3 i • mass cLmaxtgs c3 ( C h/ fl rent f) / » The Game With remaining class time, play a few games. Play a game at each level until you have earned a perfect score for each. Take a screen shot and paste it below . ( Command + Shift + 4) It will show up on your desktop so you can drag it in. Atom Turotial: Click on the following link ( or type into your browser ), and complete the interactive tutorial. Teachers Domain: Atom Tutorial http: / / www .teachersdom ain .orq / resource / lsps 07.sci.phvs.matter.theatom / Atom Video Clip: Click on the following link ( or type into your browser ), and watch the interactive video clip . BBC: Elements and Atoms Interactive Video Clip http : / / www. bbc.co.uk / schools / ks 3 bitesize / science / chemical material behaviour / atoms elem ents / activity. shtml Complete the table below after class as homework / practice. Protons Neutrons 4 4 4 4 5 5 6 1 7 6. 8 8 ii. i 16. Atomic Number Electrons 5 2 Mass Charge Element Full Symbol Number 8 0 Be iBe [0 7. 3. 4. 5. 8. 9. 10. 15 12. 13. 7 13 -3 14. 17. 18. 9 20 -1 19. 3. */ /5 3 w I