Periodic Trends Investigation Lesson Plan & Worksheet Template (Page 3 of 4) in pdf

2. What appears to be the trend in the first ionization energy as you move left

to right across a period?

3. What appears to be the trend in the first ionization energy as you move from

top to bottom down a column?

4. Predict the first ionization energy of N, O, P, S, V, and Cr using the trend you

described in question two. Check the actual values using the interactive

periodic table. How well do your predictions match the actual values?

5. Predict the first ionization energy of Rb, Cs, Sr, and Ba using the trend you

described in question three. Check the actual values using the interactive

periodic table. How well do your predictions match the actual values?

6. Categorize the trend in ionization energy as generally true or absolutely true.

Defend your categorization with evidence.

7. Look at a graph of ionization energy vs. atomic number. How well do the

trends you observed match the graph?

8. Create a hypothesis to explain the trend across a period (row).

9. Create a hypothesis to explain the trend within a group (column).

10.Define second and third ionization energy.

11.Look at a chart of first, second, and third ionization energies. Describe how

the first, second, and third ionization energies compare to one another.

Create a hypothesis to explain your observations.

12.Examine the changes in ionization energy that take place as an atom goes

from an electron configuration of a noble gas to an electron configuration of a

halogen. How does the increase in ionization energy compare to other

increases?

ELECTRON AFFINITY

Use the interactive periodic table found at to help you answer

the following questions.

1. Find the electron affinity of elements in rows two, three, and four. Keep

looking up values until you think you have enough information to answer

questions two through six.

2. What appears to be the trend in the electron affinity as you move left to right

across a period?

3. What appears to be the trend in the electron affinity as you move from top to

bottom down a column?

4. Categorize the trend in electron affinity as generally true or absolutely true.

Defend your categorization with evidence.

5. Create a hypothesis to explain the trend across a period (row).

6. Create a hypothesis to explain the trend within a group (column).

Analysis

1. Sketch a periodic table. Draw two color coded arrows for each of the trends

you investigated showing the direction in periods and in rows the values

increase.

Periodic Trends Investigation Lesson Plan & Worksheet Template Page 3