University of Colorado Virtual Lab Handout Atom Screen Simulation Report

User Generated

zf7fi7

Science

University of Colorado Boulder

Description

Please complete the virtual lab that is located here: Virtual Lab Handout

Link for the simulation is: https://phet.colorado.edu/sims/html/build-an-atom/latest/build-an-atom_en.html

When the assignment is completed, submit here for credit.

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BUILD AN ATOM PART I: ATOM SCREEN Build an Atom simulation (http://phet.colorado.edu/en/simulation/build-an-atom) 1. Explore the Build an Atom simulation with your group. As you explore, talk about what you find. 2. a) List two things your group observed in the simulation. b) 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. What did you discover? 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. a) Fill in the blanks below to show your results: Neutral atoms have the same number of protons and electrons. Positive ions have ________________________________ protons than electrons. Negative ions have _______________________________ protons than electrons. b) 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. 6. Play with the simulation to discover what affects the mass number of your atom or ion. a) What is a rule for determining the mass number of an atom or ion? 7. Practice applying your understanding by playing 1st and 2nd levels on the game screen. BUILD AN ATOM 1 PART II: SYMBOL SCREEN 8. Using the Symbol readout box, figure out which particles affect each component of the atomic symbol. a) In the atomic symbol below, label each letter (a, b, c, and d) with: • the particle(s) used to determine the letter, and • how the value of each letter is determined. d c 9. a b 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 10. Practice applying your understanding by playing the 3rd and 4th game levels. Play until you can get all the questions correct on the 4th level. 11. In addition to atomic symbol, we can represent atoms by name and mass number. a) Complete the table below: Symbol 12 +1 6 C 18 9 11 5 Name Carbon-12 F B b) 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. BUILD AN ATOM 2 PART III: ISOTOPES 12. 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? _______________ 13. What are the names of the stable forms of oxygen? a) Oxygen-16 b) Oxygen-____ c) Oxygen-____ d) List all of the things that are the same about these atoms (ignore the electrons). e) List all of the things that are different about these atoms (ignore the electrons). 14. 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. 15. Test your understanding of isotopes by examining the relationships between the pairs of atoms listed below: Atom 1 12 6 C Carbon-12 Argon-40 11 5 B An atom with 13 protons and 13 neutrons BUILD AN ATOM Atom 2 C 13 6 12 6 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 3 EXERCISES 16. 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)? _____ b) What is the atomic number of tungsten (W)? _____ c) How many protons are there in any Cl atom?_____ d) How many protons are there in any Te atom? _____ e) Can you tell from the periodic table exactly how many neutrons are in an atom? 17. Complete the following table: Name Symbol hydrogen-2 2H Atomic number 1 Mass Number 2 Number of neutrons 1 Number of Electrons 1 Charge 0 3H sodium-22 22Na+ 10 12 24 12 12 25 13 46Ti-2 107Ag 19F-1 carbon-12 6 carbon-13 6 carbon-14 6 carbon-12 7 carbon-12 5 4He 8 argon-40 8 18 10 18 70Ga 70Ga+3 4 7 9 2 8 8 18. To test your knowledge of isotopes, draw arrows between all pairs of atoms in the table above that are isotopes of each other. BUILD AN ATOM 4
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Explanation & Answer

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BUILD AN ATOM
PART I: ATOM SCREEN
Build an Atom simulation (http://phet.colorado.edu/en/simulation/build-an-atom)
1.
2.

Explore the Build an Atom simulation with your group. As you explore, talk about what you
find.
a) List two things your group observed in the simulation.
For a given combination of protons, neutrons, and electrons, a certain element will be built.
The electrons are located in the orbits while the protons and neutrons are located in the
center or the nucleus
b) What particle(s) are found in the center of the atom?
The nucleus is comprised of the proton and the neutron.

3.

Play until you discover which particle(s) determine(s) the name of the element you build.
What did you discover?
The number of protons dictates which element is built.

4.

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
c) An atom with 4 protons and 4 neutrons: Beryllium

5.

Play with the simulation to discover which particles affect the charge of an atom or ion.
a) Fill in the blanks below to show your results:
Neutral atoms have the same number of protons and electrons.
Positive ions have more protons than electrons.
Negative ions have less protons than electrons.
b) 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.
Charge of particle = No. of protons – No. of elect...


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