Name:______Class:______

EPS Quarter 2 MCA

Review Guide

Using the Lewis Dot Structures, diagram the process of Ionic Bonding between each of the following elements.

Dot Diagram showing transfer of electrons / Formula / Name of Compound
Sodium & Bromine
Beryllium & Nitrogen

Balancing Equations: Use coefficients to balance the following chemical equations.

1. __ Mg + ___ Cl2 ―> ___ MgCl2

Conservation of Mass: Complete the following, show work and units

1. In the following reaction, 2Al + 3ZnCl2 ―> 3Zn + 2AlCl3, 54 g of Al react completely with 409.2 g of ZnCl2 to form 196.2 g of Zn metal. How many grams of AlCl3 are formed?.

Chemical Reactions

Create and label an exergonic and endergonic graph (Energy on y axis, Time on X axis). Be sure to use the following terms.

Which type of reaction has reactants with more energy than products?______

Which type of reaction has reactants with less energy than products?______

Radioactivity

1. Calculate how much of an 80 g sample of carbon -14 will be left after 17,190 years if the half life of Carbon-14 is 5730 years?

2. Show 1 alpha decay and 1 beta decay of Uranium – 239.

3. Explain the difference between nuclear fission and nuclear fusion.

4. List the following in order of increasing energy: Beta, Alpha, Gamma

5. Describe what is emitted from the nucleus in the following types of decay:

Alpha:

Beta:

Gamma:

Radioactivity (continued)

6. Describe why large nuclei decay and small nuclei are stable.

7. Describe a chain reaction in nuclear fission.

8. Describe nuclear fusion that occurs in the sun. What 2 elements are involved?

Motion

1. Define and give units for the following terms

Speed

Velocity

Acceleration

Distance

Displacement

2. Calculate the following problems

a. A runner travels 5 kilometers in .5 hours. What is her average speed?

b.  If the skate boarder starts from a stop and is traveling 3 meters/sec in 2 seconds, what is her acceleration?

3. If an object is moving in a circle, describe the direction it is moving at any instant in time.

Forces & Momentum

b. Explain what happens to the gravitational force if the distance increases or decreases between the two masses.

2. If the mass of an object is 2 kg and it is accelerating at 4m/s/s, what is the force on the object?

2. After the collision shown below, the two cars stick together. Find the final velocity of the two cars using the momentum formula.

Before the Collision:

What is the momentum of the 1kg moving car above?

After the Collision:

Use the momentum from before the collision and calculate the velocity of the 2 moving cars after the collision above.

Use the table below to answer questions 3, 4, and 5.

Time of Fall for Dropped Objects

Object / Mass (g) / Time of Fall (s)
A / 5.0 / 2.0
B / 5.0 / 1.0
C / 30.0 / 0.5
D / 35 / 1.5

3. If the objects in the data table above all fell the same distance, which object fell with the greatest average speed?

4. Explain why all four objects don’t fall with the same speed.

5.a. On which object was the force of air resistance the greatest?

b. Explain how you know this object had the greatest air resistance.