how the periodic table is organized

Essential Question:What did medeleev discover?
What information does the periodic table contain?
How is the periodic table useful?

Unit Essential Question/Big Idea:How is the periodic table organized?


What Type of Lesson: (Introductory/Aquisition, Extending Thinking, or Assessment)


Scholar Centered Learning Goal: (Statement of Objective should be posted on the board)Students will read the periodic table in order find information about specific elements in the periodic table



Resources/Materials:

• Chemistry Scavenger Hunt (PDF) handout (PDF)

Instructional Presentation (Please see the instructional presentation sequences per content)

Do Now: binder
Engagevideo  the genius of mende....

  
Explore:My planet diary

Explain:
1) Distribute the Periodic Table of the Elements essay handout and have students read it. When they have finished, lead a discussion about how it was possible for Mendeleyev to develop a periodic table of elements before atomic structure, the essence of the table, was even known. 

students work in pairs as they explore the Periodic Table of the Elements interactive activity.

Direct students to several sample elements within the interactive and identify the following information specific to each:

• The atomic number refers to the number of protons in the nucleus of the element's atoms. (Gallium, for example, has 31 protons.)
• The atomic mass increases as the atomic number increases, but unevenly. This is because the number of protons does not always equal the number of neutrons. The listed atomic mass is the average mass for all forms, or isotopes, of each element.
• The number of neutrons shown is the number for the most common isotope of the element.
• Electron configuration is the number of electrons found in each energy level of the element's atoms, starting from the innermost, or lowest, energy level.

2) Distribute copies of the Chemistry Scavenger Hunt (PDF) handout and allow 10 minutes for pairs of students to locate the missing information.

 

CFU:What four pieces of infromation are included in each element square of the periodic table? 

What is the atomic number?


Elaborate/ Evaluate:

3) students to work independently to create their own Chemistry Scavenger Hunt. Tthey are to plan the table so that the left column symbols, when placed in order side by side, spell a word. The symbols for francium (Fr), iodine (I), carbon (C), titanium (Ti), oxygen (O), and nitrogen (N), for example, spell the word friction.

• For each element,  students fill in three or four columns, including at least one of the shaded columns.
• students exchange their Chemistry Scavenger Hunts with fellow students and complete them.

Exit ticket:Assess your understanding