Model of an Atom

Model of an atom

Part A. Answer the following questions completely and neatly before constructing models.

1. List the sub-atomic particles that make up atoms.

Protons, Neutrons, Electrons,

2. Where is each sub-atomic particle located in an atom?

Protons & Neutrons in the nucleus Electrons orbit the nucleus

3. What does the atomic number on the periodic table tell us about an atom?

The number of protons in the nucleus of an atom.

4. What does the atomic mass on the periodic table tell us about an atom?

The number of protons AND neutrons in the nucleus of an atom.

5. What is the charge of each sub-atomic particle?

Protons (+, positive), Neutrons (=, neutral), Electrons (-, negative),

6. In a neutrally charged atom, which two sub-atomic particles will have the same quantity?

Protons and Electrons,

7. Atoms that have more protons compared to electrons or more electrons compared to protons are called? Ions

8. Atoms that have the same protons but different number of neutrons are called? Isotopes

9. If I wanted to create a new element what would I need to be able to do? Fusion

10. What element has 14 protons and 14 neutrons in the nucleus?

Si (Silicon) Part B. Build models of atoms.

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

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.

A. Oxygen ______B. Sulfer ______C. Arsenic ______D. Krypton ______E. Aluminum ______

Part C. Build models of molecules

Use the following key to build your models.

Blue beads = Nitrogen Black beads = Carbon White beads = Oxygen Red Beads = Hydrogen

Make models of the following molecules.

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 ______

Part D. Modeling photosynthesis

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.

Part E. Modeling respiration

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

1. How were the beads used to model atoms and molecules?

Blue (protons) and Black (neutrons) were the particles in the nucleus. White (electrons) orbit around the nucleus.

2. Why do you think we use models? To visualize things that are smaller than we can actually see.

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

4. How do the number and size of molecules compare before and after the process of respiration?

Before = 1 large molecule and 6 small molecules After = 12 small molecules

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.

6. Write the equation that shows how plants make sugar.

6 H2O + 6 CO2  C6H12O6 + 6 O2

7. Write the equation that shows how animals use sugar and oxygen to produce CO2.

C6H12O6 + 6 O2  6 H2O + 6 CO2

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.

9. Fill in the missing information (?) to make these equations be possible based on the number of atoms before and after the reaction.

a. C3H ? + 5O2  3CO2 + 4H2O Answer: _____8______

b. CaCO3  CO2 + ? O Answer: _____Ca______

c. 2N2O5  ? NO2 + O2 Answer: _____4______