<p> Model of an atom</p><p>Part A. Answer the following questions completely and neatly before constructing models.</p><p>1. List the sub-atomic particles that make up atoms.</p><p>Protons, Neutrons, Electrons,</p><p>2. Where is each sub-atomic particle located in an atom?</p><p>Protons & Neutrons in the nucleus Electrons orbit the nucleus</p><p>3. What does the atomic number on the periodic table tell us about an atom?</p><p>The number of protons in the nucleus of an atom.</p><p>4. What does the atomic mass on the periodic table tell us about an atom?</p><p>The number of protons AND neutrons in the nucleus of an atom.</p><p>5. What is the charge of each sub-atomic particle?</p><p>Protons (+, positive), Neutrons (=, neutral), Electrons (-, negative),</p><p>6. In a neutrally charged atom, which two sub-atomic particles will have the same quantity?</p><p>Protons and Electrons,</p><p>7. Atoms that have more protons compared to electrons or more electrons compared to protons are called? Ions</p><p>8. Atoms that have the same protons but different number of neutrons are called? Isotopes</p><p>9. If I wanted to create a new element what would I need to be able to do? Fusion</p><p>10. What element has 14 protons and 14 neutrons in the nucleus?</p><p>Si (Silicon) Part B. Build models of atoms.</p><p>Use the following key to build your models. This page must be signed by the teacher or someone that has been checked off. Blue beads = protons Black beads = neutrons White beads = electrons</p><p>Make models of an atom of the following elements. Use your periodic table to help you determine the number of each sub-atomic particle. When you have completed your model for an atom get my signature below and then move on to the next element.</p><p>A. Oxygen ______B. Sulfer ______C. Arsenic ______D. Krypton ______E. Aluminum ______</p><p>Part C. Build models of molecules</p><p>Use the following key to build your models.</p><p>Blue beads = Nitrogen Black beads = Carbon White beads = Oxygen Red Beads = Hydrogen</p><p>Make models of the following molecules.</p><p>A. Water H2O ______B. Carbon Dioxide CO2 ______C. Sugar (carbohydrate) C6H12O6 ______D. Ammonia NH3 ______E. Methane CH4 ______F. Oxygen we breathe O2 ______G. Propane C3H8 ______</p><p>Part D. Modeling photosynthesis</p><p>A. Construct 6 CO2 molecules and 6 H2O molecules B. Rearrange the 12 molecules you made above into 1 C6H12O6 molecule and 6 O2 molecules.</p><p>Part E. Modeling respiration</p><p>A. Construct 1 C6H12O6 molecule and 6 O2 molecules. B. Rearrange the 12 molecules you made above into 6 CO2 molecules and 6 H2O molecules Part F. Analyzing models</p><p>1. How were the beads used to model atoms and molecules?</p><p>Blue (protons) and Black (neutrons) were the particles in the nucleus. White (electrons) orbit around the nucleus.</p><p>2. Why do you think we use models? To visualize things that are smaller than we can actually see.</p><p>3. How do the number and size of molecules compare before and after the process of photosynthesis? Before = 12 small molecules After = 1 large molecule and 6 small molecules</p><p>4. How do the number and size of molecules compare before and after the process of respiration?</p><p>Before = 1 large molecule and 6 small molecules After = 12 small molecules</p><p>5. Why do you think photosynthesis is considered a process where plants make their own food? (hint: think size of molecule) Turn small molecules into larger molecules.</p><p>6. Write the equation that shows how plants make sugar.</p><p>6 H2O + 6 CO2  C6H12O6 + 6 O2</p><p>7. Write the equation that shows how animals use sugar and oxygen to produce CO2.</p><p>C6H12O6 + 6 O2  6 H2O + 6 CO2 </p><p>8. People eat food (carbohydrates, etc) and breath in oxygen. Make a diagram that shows what you think happens to the atoms in this process.</p><p>9. Fill in the missing information (?) to make these equations be possible based on the number of atoms before and after the reaction.</p><p> a. C3H ? + 5O2  3CO2 + 4H2O Answer: _____8______</p><p> b. CaCO3  CO2 + ? O Answer: _____Ca______</p><p> c. 2N2O5  ? NO2 + O2 Answer: _____4______</p>